So eh have I understood this wrong because I thought this mod could make texture/resource packs with optifine features work with fabric?

For example I can get some other texture packs working but I can't get rotrblocks working at all. It just doesn't even show up. (ie. texture etc. nothing is applied to blocks)
https://www.curseforge.com/minecraft/texture-packs/rotrblocks

Nvm the whole thing is zips in zips and I was unpacking it wrong? Stupid nonsense