A notable part of Evan Boehs getting Truth Social to be AGPL complaint is that they are not the copyright holder, which gives a lot of hope. An "end user" suing for compliance hasn't been concluded in court yet (there is one in process SFC vs [edit] Vizio). If that succeeds then perhaps getting compliance will be easier in the future!
Sadly getting compliance also includes them just engineering the non-compliant code out - so they enjoy the use of free software for some time without ever giving back.