Good children's programming

Looking for recommendations. A couple of years ago my kid's favorite show was Just Add Magic. More recently he was really into Secrets of Sulphur Springs and Mysterious Benedict Society. We tried Ghost Writer a while back and Evermoore more recently but neither stuck. Anything good out there along those lines for an 11 year-old?

This is in a different lane from the reference points you are giving but my 8- and 10-year-old are both really into the original Avatar: The Last Airbender. other than that, following the thread to see what others suggest!

Nothing compares to Avatar: The Last Airbender. We binged it at the beginning of the pandemic and I think my now 8 yo has watched the whole series 3 or 4 times since. The Legend of Korra is worth checking out if hungry for more. It's not at the level of Avatar, but it has its moments. On a far different note from Avatar, my daughter is re-watching Gravity Falls for like the third time as well.