Kindle rotation lock
Where did the IOS Kindle app rotation lock option go? I can’t find anymore. It is so useful.
iPad Air, iPadOS 14
If, for that app, there was (is) a "lock rotation" button inside its settings (and you can't find it anylonger) contact Kindle support team and ask them.
If you're talking about a "general" lock rotation button on an iPad, see this support article:--> Rotate the screen on your iPad - Apple Support
Regards
Giulio