There's no built in system for this, but you could basically just make a procedure that triggers on entity update tick, and gives the entity plus a certain amount of y velocity if they're not on the ground. (Vanilla gravity is roughly -9m/s, or 0.45m/tick, so unless you want antigravity you don't want a value bigger than 0.45.)
There's no built in system for this, but you could basically just make a procedure that triggers on entity update tick, and gives the entity plus a certain amount of y velocity if they're not on the ground. (Vanilla gravity is roughly -9m/s, or 0.45m/tick, so unless you want antigravity you don't want a value bigger than 0.45.)