Just today I migrated my hosting setup and use my private Gitea instance instead of GitLab. But because this is hosted at my home, I don't want to trust it and it's backups completely and have a fallback too. In the past I used GitLab for such tasks, but now I'm choosing Codeberg instead.
Codeberg is a registered German non-profit organization (it's an “eingetragener Verein”). They basically provide free Git hosting, but you can donate or become a member too and support it. I will also do it soon.
If you are in search for a trustable Github or GitLab alternative, I highly recommend taking a look at Codeberg. Codeberg is using Gitea for it's Git hosting too.