Can I use NLA Editor with a library-Override or Proxy object?

I have a character rig that has animations for walking, running, etc… He is linked into a different file where he will be animated with a background environment and other characters also linked from other files. Here’s the thing, I can barely use the NLA editor with any of his actions, I can add actions to the NLA timeline, but I can’t change any of the variables of the strip, I can’t change blending, or make it cycle, all because he is linked. Am I missing something? Because this seems very counter-intuitive.

So it turns out, I just updated from 2.91 to 2.93 and now I can use the NLA strips with my library-override rig. So if something doesn’t seem right, just update, or, go back to an older version.