Even if one thought that this would help the people that need help on this matter, you can't really fork signal as it is today, I think. Or at least whatever it is that signal is using on its servers because that is very unlikely to be the software in its public repo, which hasn't been updated in almost a year. And even for a while before then, most of the commits were version bumps with no visible changes on the code.

If anything, that's another problem with signal that's not getting enough attention (that I've seen): It claims to be open source, but as of now, it doesn't seem to be. At least not in the servers.