When I saw your post the first thing that came to mind was Breath of the Wild. It's the game that got me back into gaming. I've recently been playing Tears of the Kingdom and it has been a ton of fun with the new building abilities that were added. I'd highly recommend giving that a shot.

For games with that sense of wonder but on a smaller scale that are more chill, I'd recommend something like Omno, which is on sale for super cheap right now. It's a short game with a great soundtrack that's all about exploring and solving some puzzles. Journey would be another good one to try.

I also liked the suggestions here about buying the Steam Deck. Sometimes a new piece of hardware can really ignite the spark. Taking a break and trying a different hobby is also a good idea. I'd suggest Lego building. I found making sets for some of my other interests like Star Wars and others can be really fun and relaxing. It's nice to do something with your hands and turn off your brain for a bit. I'd even listen to audiobooks while I built.