Replication help!

Hi, I am pretty new to UE5 and would love to try make a multiplayer game. with some functions like: Stamina, Health, Hunger and Thirst, Sliding, Building. I made a crouch, sliding and running system that works on singleplayer as i thought that when you join as a client, all the logic for the player applies to each instance of the character. But my client cant run or slide or crouch. The only thing that works is the shrinking of the player capsule😂 Please may i get some advice on how to develop and prep these functions for multiplayer compatibility? Appreciate it