I have set up a downtime schedule and it seems to work fine except for YouTube. I don’t have it as Allowed but it is still available during downtime... What am I doing wrong??

Greetings RobSkag.

Welcome to Apple Support Communities! It's great to have you here.

We see from your post that your downtime schedule does not include YouTube on the Allowed list, but the app is still accessible during the scheduled downtime. It's our pleasure to help!

On that note, we've found this thread which includes some helpful tips to guide you: https://discussions.apple.com/thread/251294986

We trust this will provide some insight, and set you on the path to getting this resolved.

All the best!