How to put all the SimulationGroup in FixedUpdate ?

Hi everyone,
I'm getting a lot of Stuttering/Jittering within my game while running between 55~60 fps (mobile), 260~300 (editor)
It seems like when the fps is not stable in a single value the character or camera become crazy.
Yes! I'm smoothing movements using math.lerp and deltaTime , player movement system is withing the SimulationSystemGroup, camera follow system is within PresentationSystemGroup.

It seems like i need to put all the SimulationSystemGroup in a Fixed Frame Rate (FixedUpdate). How to can i do it ?
I can also set the targed frame rate to 30 fps but I want the player communication with server to be faster than 30ms.

 

https://forum.unity.com/threads/upd...-frequency-with-new-apis.657565/#post-4721600

 

Take the ClientServerWorld from the multiplayer package as template:
https://github.com/Unity-Technologi...leproject/Assets/NetCode/ClientServerWorld.cs