Signed git tags have label 'Unverified' despite key being correct and known by GitLab

GitLab currently detects git tags that have a signature, but always labels them as Unverified. Example from https://gitlab.com/ottok/debcraft/-/tags

The GitLab data model is aware of user OpenPGP and SSH keys, and when commits are correctly signed, a label will appear that shows Verified when everything is correct. Example from https://gitlab.com/ottok/debcraft/-/commits/main below

If commits are not correctly signed, the label Unverified is shown along with additional details in a pop-over.

Currently for git tags, the label always shows Unverified, which is incorrect.

There are multiple discussions online about this bug, e.g. in https://forum.gitlab.com/t/gpg-signed-tags-are-marked-as-unverified-commits-are-fine/130158.

Related issues and commits

The data model for OpenPGP tag signatures was added in #570530 (closed). Another issue about SSH signed git tags showing Unverified was filed in #555436 (closed) and supposedly fixed via !201444 (merged), but I am not sure if it has been verified as the test cases referred to in #384473 (closed) still show Unverified, so it might be that this bug applies to all signed git tags regardless of key type.