I searched the questions on the site and I tried a lot of solutions but I'm kinda stuck here.
When I move a bone on one side, the other side moves with it, basically mirroring it. It is not parented to the other side's bones and I have no clue why it is happening, I tried applying all deformations, I've renamed every bone with .L and .R, I tried remaking the armature, but the problem, for some reason, persists. It applies on all mirrored limbs, fingers included.