me and my friend had a delay on aternos and before we imported forgery into our world everything was fine and my friend could water bucket jump. but after I imported the forgery mod everything clientside is delayed as if it was now serversided. could it be possible to add a config tag to turn that back into clientside?

i'm just going to assume that was it.

something is probably just screwing with performance? forgery has a silly amount of features and not all of them very optimal.
features like entities_sink_in_falling_fluids,collision_based_landing_pos probably being at fault.
also should enable general.limit_runtime_configs
could also be that you have balance.extra.velocity_based_fall_damage_reset on which would prevent water bucket jumping.