Need Help With Multiplayer setup

|||Prerequisite|||
So I’m making my first robot battle game, called Robot Arena. It doesn’t look great right now, but I’ll work on the visuals later.
|||The Essence of The Problem|||
So this is a multiplayer game, lobbies work fine. The problem is that the host moves and performs actions fine, but the player on another device for some reason controls the host, and cannot move properly, just stands still and “shakes”.
|||Technical Essence|||
Players are actually two separate objects, I did this to make it easier to implement the hit system and weapon changes, players also have multiplayer behavior, player 1 is marked as player 1 and player 2 as player 2 respectively.

Help me make everything work please.