After a fresh install of Waydroid on my Pixel 3a, I had limited access to the navigation buttons at the bottom of the Android screen. I saw a post about this at:
and tried in a terminal:
waydroid prop set persist.waydroid.height_padding 65
on my Pixel 3a. I did not use "sudo".
This made the lower buttons clear the bottom of the screen just fine. Thanks for the tip!