Codeberg is a german Github alternativ based on Gitea.
You can find detailed informations about Codeberg here: https://docs.codeberg.org/getting-started/what-is-codeberg/
You can fetch information via the public profile and Gitea API.
For Example my Profile: https://codeberg.org/api/v1/users/techducks
You can use the website or description attribute.
I tried to find an alternative option to fetch information without adding your fingerprint in a public bio.
But all other API methods require an authentication with an api key.
Here you can find the full api documantation of the Gitea API:
Gitea is already supported, and so is Codeberg
Ups, sorry you are right.
Is it possibly and idea to "rename" this field.
So that you can decide for yourself whether to call the field Gitea or Codeberg.
Same with "activitypub".