tetaneutral.net mirror not updated since 23/04/2022
https://fdroid.tetaneutral.net/fdroid/repo provides only 3824 apps while https://ftp.lysator.liu.se/pub/fdroid/repo/ provides 3953 apps.
as far as I see the last update on that mirror was on 23/04/2022 .
Nevertheless the f-droid app has it still available as mirror. The the user has to deactivate it manually. Those who are not aware of it, will receive an old repo.