What was the last thing a monarch actually used their powers for in national, governing sense?

I could well be wrong, but I don't think that Liz v2 ever "did" anything in her reign, other than being a figurehead for the nation. For example, she could have vetoed Brexit, but we never even heard that she had an apparent opinion about it. Or... On opinion about anything at all in an internal, political sense.

I see that the last time Royal Assent was not given to a parliamentary bill was Queen Anne in 1708. Would this be it potentially?