Looking into this effort closely:
“The ultimate goal of FSEP is to provide Federating platforms the ability to integrate with dynamically updating blocklists. Now that we have released the v1.0 document, we need the help and collaboration of the broader Fediverse Trust & Safety community….We want FSEP to ultimately be compatible with all major Fediverse platforms, including but not limited to Mastodon, PixelFed, CalcKey, and more.”
https://nivenly.org/blog/2023/08/10/federation-safety-enhancement-project-announcement/