IMO Gitea is fairly protected against a 'random' relicensing, as the project does not use a contributor licensing agreement.

While license and quality shenanigans can still happen, say if their technical oversight committee went bad, they cant do the same sort of rugpull done by projects that made contributors give all ownership interest to a single party.

GOGS (gitea's origin project) is still around and keeps moving at its own pace, as well.