My favourite recent discovery is Assistive Access in the iOS Accessibility settings. You pick the apps you want access to (and set privacy permissions), then when you launch the mode your iPhone only shows those apps.

If you feel a sudden compulsion to access something you didn't allow yourself, you have to exit the mode, which takes as long as a reboot.

There are quite a few limitations of this mode, so it won't be for everyone (or maybe anyone on here?) but it's a pretty good detox. A lot stronger than screentime restrictions.