I HAVE FOUND IT!!!!! I will tell you here but i will also make a tutorial about it bc there werent any tutorials on yt (this works with any launcher). so basically what i did is opened the old minecraft (any vesion before the update that added the sound re-link option in sound settings) and went to the windows Sound Output. then pressed "more volume settings". after that i went to volume mixer (minecraft still on) and found minecraft. then pressed the little arrow and changed both input and output device to my headphones. now it works! The only bad thing is that if you wanna switch to your speakers u gotta go through that whole process again. For some reason this problem only happens for bluetooth headphones or erabuds and not headphones with a jack or a usb. hope this helped!
edit: thanks to PaintsplattersMC for finding the sulotion too
