I've always found Android's Digital Wellbeing controls too blunt. It's all-or-nothing (on purpose?): disable an entire app or greyscale the whole system. This is useless for apps like Reddit or Instagram where I still need to check DMs but want to kill the scrolling trap.

Found an open-source app, DetoxDroid, that solves this. You can set time limits per-app, and it will then greyscale (or disable) only that specific app. It's exactly the granularity I was looking for.

Not my project (I did make a PR today though), but thought others here might find it useful, and think it deserves some more attention!

GitHub: https://github.com/flxapps/DetoxDroid

Amazingly, it works without root, only requires the extra 'WRITE_SECURE_SETTINGS' permission (for greyscale) and you can audit it, fork it and build your own version if you're security conscious.