How to change the client character from Grayman

I’m a beginner. I’m sorry if it’s a basic question.

I am making a multiplay game.
I want to change the default character from Grayman, but I can’t change it on the client side.

The mesh of the third person character has changed, and the server side has changed normally.
image

Also, if you check only this level with play in editor, the changed character can be used on the client side as well.
But starting from the previous level of managing server connections, the character hasn’t changed.
Here’s how to connect to the server.

I’m using UE4.25