There's a mod and a few utilities you can use to manage addons. They all have their own pros and cons.
You must be registered to see the links
This is an in-game addon that uses BepinEx. It's very handy, and can load VAR's based entirely on what scene you are loading.
This one is what I currently use but I am not completely satisfied with, there doesn't seem to be a built in way to uninstall (you just remove from your addon packages folder) but overall it works well enough.
You must be registered to see the links
I like this one a lot, but honestly am a little too stupid to use effectively. I use the morphs preset maker function to see what morph packs I have installed, and the duplicate item resolver to remove dupes. However it doesn't seem to give you per var control of what you have installed, instead relegating it to save/var based dependencies.
This is a very good tool and will work for most folks.
You must be registered to see the links
This one I used for quite a while but eventually I gave up trying to wrestle with the constant crashes and occasional loading/unloading of a bunch of VAR's based on dependency.
You must be registered to see the links
This one seems like a crapshoot. It's no longer maintained and hasn't ever worked for me.
I'm sure I am missing some, but this is what I've found so far. Hope that helps!