Screen rotation control

See this guide:--> If the screen doesn't rotate on your iPhone, iPad, or iPod touch - Apple Support

If you get no help, have your device inspected at an Apple Store or Authorized Service Provider:--> Apple – Location Selector

Regards

Giulio

I just got an XR last week and have the same issue. I shut down my phone and restart. It seems to work but I don’t want to have to do this every time it happens. And it’s happens more than several times.