@kuenefe it depends...I've been using the #Forgejo instance hosted by @disroot since I already have an account. For @snipette I used to maintain a dedicated Gitea (later Forgejo) instance installed via #YunoHost, because we had a bunch of tools that we wanted to publish
The "go-to" option nowadays is @Codeberg (again running Forgejo), which we use for @prav
Besides Forgejo, there are a bunch of more minimal options like #sourcehut and #humungus