Altititude hold mode thrust sensitivity

How to increase vertical acceleraion (thrust), with throttle stick at max, in altitude hold mode?
I tried increasing all MPC_[…] parameters related to verical velocity and acceleration but it does not seem to help.
Ideally, I would like (in altitude hold mode) for thrust to be at max with throttle at max.

Found the problem – I had MPC_LAND_ALT1, MPC_LAND_ALT2 configured incorrectly, and this prameters can significantly slow down vertical velocity.