Auto/Manual Gain

It would be nice to set a ‘target’ Radio level (like I always have to have -62dB Power level) because I have problems with the current level.
I have a 15.3mile link with RSSI moving 850 to 1400 (no, it has a CLEAR LOS!)
and it seems, the slave stays on 24dB tx gain, while master stays on 20dB tx gain what gives me a moving power level on slave (-60 to -70dB).
Why the master doesn’t increases the tx, if slave has low power???