Debian Group Repository endpoint not showing repository content

After creating a Debian "group" distribution there does not seem to be any Release or Packages files associated with it. Example:

$ curl --request POST --header "PRIVATE-TOKEN: ${PRIVATE_TOKEN}" \
    -d "codename=buster" \
    -d "components[]=main" \
    -d "components[]=non-free" \
    -d "architectures[]=amd64" \
    -d "architectures[]=arm64" \
    -d "architectures[]=source" \
    "https://${SERVER}/api/v4/groups/${GROUP}/-/debian_distributions" \
; echo
{"id":42,"codename":"buster","suite":null,"origin":null,"label":null,"version":null,"description":null,"valid_time_duration_seconds":null,"components":["main","non-free"],"architectures":["all","amd64","arm64","source"]}
$ curl --header "PRIVATE-TOKEN: ${PRIVATE_TOKEN}" "https://${SERVER}/api/v4/groups/${GROUP}/-/debian_distributions"; echo
[{"id":42,"codename":"buster","suite":null,"origin":null,"label":null,"version":null,"description":null,"valid_time_duration_seconds":null,"components":["main","non-free"],"architectures":["all","amd64","arm64","source"]}]
$ curl --header "PRIVATE-TOKEN: ${PRIVATE_TOKEN}" "https://${SERVER}/api/v4/groups/${GROUP}/-/packages/debian/dists/buster/Release"; echo
{"message":"401 Unauthorized"}
$ curl --user "api_token:${PRIVATE_TOKEN}" "https://${SERVER}/api/v4/groups/${GROUP}/-/packages/debian/dists/buster/Release"; echo
{"message":"404 Not Found"}

Where doing the same thing with a project repository works just fine:

$ curl --request POST --header "PRIVATE-TOKEN: ${PRIVATE_TOKEN}" \
    -d "codename=buster" \
    -d "components[]=main" \
    -d "components[]=non-free" \
    -d "architectures[]=amd64" \
    -d "architectures[]=arm64" \
    -d "architectures[]=source" \
    "https://${SERVER}/api/v4/projects/${PROJECT}/debian_distributions" \
; echo
{"id":27,"codename":"buster","suite":null,"origin":null,"label":null,"version":null,"description":null,"valid_time_duration_seconds":null,"components":["main","non-free"],"architectures":["all","amd64","arm64","source"]}
$ curl --header "PRIVATE-TOKEN: ${PRIVATE_TOKEN}" "https://${SERVER}/api/v4/projects/${PROJECT}/debian_distributions"; echo
[{"id":27,"codename":"buster","suite":null,"origin":null,"label":null,"version":null,"description":null,"valid_time_duration_seconds":null,"components":["main","non-free"],"architectures":["all","amd64","arm64","source"]}]
$ curl --header "PRIVATE-TOKEN: ${PRIVATE_TOKEN}" "https://${SERVER}/api/v4/projects/${PROJECT}/packages/debian/dists/buster/Release"; echo
{"message":"401 Unauthorized"}
$ curl --user "api_token:${PRIVATE_TOKEN}" "https://${SERVER}/api/v4/projects/${PROJECT}/packages/debian/dists/buster/Release"; echo
Codename: buster
Date: Mon, 27 Feb 2023 22:02:03 +0000
Acquire-By-Hash: yes
Architectures: all amd64 arm64 source
Components: main non-free
MD5Sum:
 d41d8cd98f00b204e9800998ecf8427e        0 main/binary-all/Packages
 d41d8cd98f00b204e9800998ecf8427e        0 main/debian-installer/binary-all/Packages
 d41d8cd98f00b204e9800998ecf8427e        0 main/binary-amd64/Packages
 d41d8cd98f00b204e9800998ecf8427e        0 main/debian-installer/binary-amd64/Packages
 d41d8cd98f00b204e9800998ecf8427e        0 main/binary-arm64/Packages
 d41d8cd98f00b204e9800998ecf8427e        0 main/debian-installer/binary-arm64/Packages
 d41d8cd98f00b204e9800998ecf8427e        0 main/binary-source/Packages
 d41d8cd98f00b204e9800998ecf8427e        0 main/debian-installer/binary-source/Packages
 d41d8cd98f00b204e9800998ecf8427e        0 main/source/Sources
 d41d8cd98f00b204e9800998ecf8427e        0 non-free/binary-all/Packages
 d41d8cd98f00b204e9800998ecf8427e        0 non-free/debian-installer/binary-all/Packages
 d41d8cd98f00b204e9800998ecf8427e        0 non-free/binary-amd64/Packages
 d41d8cd98f00b204e9800998ecf8427e        0 non-free/debian-installer/binary-amd64/Packages
 d41d8cd98f00b204e9800998ecf8427e        0 non-free/binary-arm64/Packages
 d41d8cd98f00b204e9800998ecf8427e        0 non-free/debian-installer/binary-arm64/Packages
 d41d8cd98f00b204e9800998ecf8427e        0 non-free/binary-source/Packages
 d41d8cd98f00b204e9800998ecf8427e        0 non-free/debian-installer/binary-source/Packages
 d41d8cd98f00b204e9800998ecf8427e        0 non-free/source/Sources
SHA256:
 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855        0 main/binary-all/Packages
 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855        0 main/debian-installer/binary-all/Packages
 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855        0 main/binary-amd64/Packages
 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855        0 main/debian-installer/binary-amd64/Packages
 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855        0 main/binary-arm64/Packages
 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855        0 main/debian-installer/binary-arm64/Packages
 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855        0 main/binary-source/Packages
 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855        0 main/debian-installer/binary-source/Packages
 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855        0 main/source/Sources
 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855        0 non-free/binary-all/Packages
 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855        0 non-free/debian-installer/binary-all/Packages
 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855        0 non-free/binary-amd64/Packages
 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855        0 non-free/debian-installer/binary-amd64/Packages
 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855        0 non-free/binary-arm64/Packages
 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855        0 non-free/debian-installer/binary-arm64/Packages
 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855        0 non-free/binary-source/Packages
 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855        0 non-free/debian-installer/binary-source/Packages
 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855        0 non-free/source/Sources

It does not appear to matter whether the group contains an existing "project" Debian repository or not.