MicroSplat by itself, doesn't work with VRChat as it relies on runtime components to function. With this system, you will only have access to the shader itself, a lot of features might not even work.
change Fixed Timestep from default 0.02 (50Hz) to 0.01667 (60Hz) or lower, depending on target platform MicroSplat https://assetstore.unity.com/packages/tools/terrain ...