UE5 Movement question on custom server

Hello First of all, I am sorry that I am a beginner who has not yet properly understood Unreal.

I built my own server, not one supported by Unreal. (for study)
Server is implemented through protobuf and IOCP socket,
and can send packets to Unreal and the server.

A question arises here.

When using a server supported by Unreal
For character movement, if bReplicates is enabled by default, it automatically synchronizes the character movement.

Is there a way to use the server character movement supported by Unreal?
by Pass the required player information or use the appropriate function?

I looked up information like FCharacterNetworkMoveData but I’m not sure how to use it.