There's been a lot of work on different recompilation tools lately. XenomRecomp and N64Recomp being two big ones.
Obviously it still takes a lot of work to go from a re-compiled console rom to a fully working PC port. But some fans are just crazy dedicated like that.
Welcome to the Club!
I had a similar issue around 2 years ago now on POP where my bootloader didn't even show up in the bios anymore.
If you still have the a USB with the live boot of POP you can use it to recover your files n stuff.
https://support.system76.com/articles/pop-recovery