Use APKPure App
Get Rotate Screen old version APK for Android
Change orientation easily with notification and widget.
If the orientation is locked, other apps can't change the orientation. For example:
Fullscreen video want change it to landscape.
This app have a widget. If you want to add widget:
Go to homescreen and hold down your finger on empty space, select widgets and slide the screen until find it
source codes : https://github.com/dogusumit/RotateScreen