Have you tried just giving it a push ?..get someone strong to help if needed, of course

If you can't just put it back in place, call a mason.

I’ll be honest, I didn’t think of that- brick and mortar is intimidating and I just assumed it was going to be a “whole thing” I wouldn’t know anything about. But, I will certainly give it a nudge- thanks for the input, guys!

In the one picture of the actual bricks, I don’t see any issue. There are no cracks showing.

Looks like the concrete toppers have been moving, though. Just give them a tiny push to align them. Perhaps the adhesive between them and the bricks needs renewing?