Borderlands 2 for xbox one/360 mods

okay idk if im missing anything but i just want to have some fun in borderlands 2 but i cant seem to find it in horizon is it not inplmented yet? or am i just blind cause i see borderlands 1 but not 2

You’re not blind. Horizon doesn’t have a BL2 save editor and probably never will. I will link you to the Gibbed BL2 save editor which is amazing.