“Kids” in quotations because sometimes “kids” shows aren’t really just for children, judging by their nuanced jokes.
Could be old, could be new.
I like a lot, two that stand out lately are Star Wars: Skeleton Crew, and Star Trek: Prodigy.
Going back a ways, Reboot and Beast Wars. (Reboot, upon relatively recent revisit earlier this year, has a few jokes that I certainly wouldn’t have gotten as a kid nor even as a teen.)
You?
Kipo and the Age of Wonderbeasts is goated with the sauce. Love the themes, the artstyle, the soundtrack, the characters… No joke, it made me cry on three occasions on my last watch (my 3rd). It’s all even better when you’re stoned.
She-ra and the Princesses of Power is really good. I like toxic yuri, and characters who just keep digging every time you think they’ve hit rock bottom.
Like others have pointed out, ATLA, Steven Universe, Infinity Train, Gravity Falls and The Owl House are all good, too.