I just reread you previous test. There will be no autotune to expect in MP.
Where you have to set it is in the parameters.
Actually only need to set a single parameter. Which is the axis you want to tune.your amp draw is high. For that weight. So you cannot complete all 4 axis at once.
Need full battery for each. Motor and prop combo is not so ideal I guess. Anyway that is beside the point.
So start with any you like and in the mode (again in the parameters) and set one of the mode switch on the RC to “22”.
Qloiter the switch to this mode and qautotune will start.
Once done. Do not switch out of the mode. Just land in same mode and disarm. Only then will the new values be changed. Can expect some axis to take as much as 6-7mins. Which might be a problem for your battery capacity.