Hello there, Rob444.
The following Knowledge Base article provides some great information and troubleshooting steps for the issue you're describing:
Specifically for troubleshooting:
Troubleshooting Rotation Lock
If your iPad display does not rotate as expected, verify that Rotation Lock is off:
- Check the status bar for the Rotation Lock icon.
- Toggle the Side Switch to verify that the device is not locked.
Note: Some apps do not rotate to match the current or locked orientation. Use the Home screen to determine Rotation Lock status.
- If Rotation Lock is off and you are still unable to rotate the iPad display, restart your iPad.
Thanks for reaching out to Apple Support Communities.
This is the worst update. I can't' use most apps out of landscape mode-the opposite of what everyone here is complaining about. I did a reset and that worked for a few days and now back to the same bs rotation lock issue. The rotation lock buttons do nothing to correct the problem. Great job Apple!!!!! Screwing up an otherwise okay device and making $100 tablets seem way better than this overpriced, buggy POS.
Android is looking a lot better!