TAKE OFF speed setting of VTOL model

Hello everybody.
I tried VTOL this time.

My plane still has a lot to fix.

The most important of these is take-off speed.

Currently taking off by default

This speed is too fast, so I set it to slow, but it’s too slow

Is it possible to take off slowly only during takeoff and at a different speed after a certain altitude?

As far as I know Q_WP_SPEED_UP is the only parameter for that currently. What is your reason for wanting different ascent phases?