It seems you are very new to minecraft modding, so I will try my best. A multiplayer game of mc consist of 2 "environments", the client and the server. The server processes and generates chunks, handles entities, and everything like that. The client is the player's minecraft, and it handles getting data from the server to render, sending packets to the server, telling the server what the player is doing, and things like that. Even in singleplayer, there is a builtin server in your minecraft, so minecraft is always a cooperation between the client and the server.That said, there are mods for the client and mods for the server. Mods that are for both have distinct components for each environment. Mods like ferritecore, for example can help with a client's or server's ram usage, depending on where you put it. Mods like sodium, iris, and entity culling, however are mods for rendering. Now, tell me, what is a mod that is for rendering supposed to do in the server environment? Wrong! Trick question, they aren't supposed to do anything for the server, they just crash it. Now could you tell me what you were hoping to achieve by adding client-sided mods to the server?
