I know that the 1.8.9 version is no longer supported but I ealso cant find the mod anywhere please bring it back I really need it.

Hi! The 1.8.9 version was really unstable and old. That's why it is no longer available. Sorry.

can't you just release the source code so that the more technical people who really want it can compile it themselves? Or make it downloadable somewhere and mark it as end of life or something.
I would really apreciate that

The CurseForge release is public again, but you really should not use this in public modpacks: https://legacy.curseforge.com/minecraft/mc-mods/fancymenu-forge/files/3141749