Hey @hllli_1414 !
I'm not sure if I understand what you mean. Depending on the platform you're on, you may be able to uninstall certain expansions/DLC (Playstation and Xbox allow this), but on PC, you don't have control over the individual content that's installed, as long as everything is activated on the account.
Could you please elaborate exactly on what you'd like to do? We'll have a better chance to help you out if you do!