A Zygisk module (flashable root zip which only works if there's also a Zygisk) that starts a sever on port 14571 where ideally microG users can then configure their microG to relay their DroidGuard stuff to it (DroidGuard is just kind of the engine of Play Integrity)
This does not fix a setup not passing play integrity, this repo is for people that don't want to execute DroidGuard (obfuscated fetched-at-runtime binary blobs) on their phone but instead have them run on some other device.
This also then means you don't have to really care about if these other Integrity bypassing measures are really as safe or not. So you can like rest easy while installing closed-source shady software that claims to make passing Integrity possible since it doesn't run on any phone you really care about anyways.
So what you'd ideally do is set this up on a spare phone you have and connect it safely somehow to the internet, point your main phone's microG remote DroidGuard runtime to it and voi la, you now route Play Integrity and other DroidGuard stuff (idk) to that phone.
This means you never have to install that much shady software to have a nice custom ROM experience.
currently this is still an AI draft so it's not been really reviewed and most importantly not debugged.
this will probably happen soon though
contributions welcome, especially android-familiar low-level experts that can review this and make it great.
(i'm just some visionary with his AI, not an expert android modder)