I also selfhost forgejo and im really happy with it. (I moved from GitLab.) Personally I cant wait for federation (which GitLab is also working on). If it were so be implemented, then ppl could actually contribute so projects on selfhosted git servers, which I am really looking forward so.
But the greens have nothing to do with this one. They were not mentioned once in this article, see:
The culprits are the SPD and CDU, the latter being in the opposition. Your reasoning does not make sense here.