Regarding Forgejo [0] there are a number of other open providers listed on the delightful forgejo [1] curated list. In addition there is a Professional services repository [2] where services are listed in the issue tracker.

[0] https://forgejo.org

[1] https://delightful.coding.social/delightful-forgejo/#public-...

[2] https://codeberg.org/forgejo/professional-services/issues