Dedicated server physics - update ratio

Ello
I have little multiplayer game working (client-host). Now I trying move it to dedicated server.
One of things that I want to get right (smooth) is physics.
Sinking vehicle (going little to ground and back) on the client is worrying me. I set ‘Min net update frequency’ still no effect.

Is there flag or other place that tell dedicated server to increase physics update ? (server have plenty free CPU)
Or this is dead end and I need do things different?

UE 4.27.2c/dedicated server (NULL), same network.
Effect here Dedicated server fun :) - YouTube