Unity Multiplayer Help pls

hello everyone, I started a small 2D Top Down mobile project (multiplayer), I used Photon Pun, I created rooms and characters, and the players responded to keyboard control, I opened it on 2 different PCs and both moved, however, when I put the buttons to move the player on the cell phone, and I entered with 2 players in the same room, they did not respond to the buttons.
The way I created the buttons was by placing a Canvas in the player and the buttons. They don't move in the room, someone please help me.