It's based on the Trenton Lee Stewart series of YA books, and they're basically adapting one book per season. Trailer here.

It is indeed YA, and Disney+ rates the show at TV-PG, but as a kidless age 50+ adult who still watches cartoons and reads the occasional comic book :), I love both the books and the show. YMMV. When S1 first dropped, a lot of people were likening it to Wes Anderson or A Series of Unfortunate Events.

Just me, but every now and then it's good to shower off the TV-MA dark-dark-dark spatter of most streaming shows with some lighter TV-PG or TV-Y7 kid stuff. Or hell, in the case of Bluey, TV-Y. :)