I use a bluetooth gamepad/controller for this exact function. Tested on a P78 which is basically runs the same OS and default reader app, it works without a problem. With a suitable tablet stand, I'm able to just lay flat and turn pages without ever holding or touching the actual device.
Here is the link just to see the actual device because you might be able to buy it locally:
https://www.aliexpress.com/item/1005...36455289%22%7D