I don’t use Waydroid but I see there are reports of the graphical display being garbled when dual GPUs are in use, see this report for instance (which has a link to a script to choose the GPU):
There is also a bit in the wiki saying nvidia GPUs have issues.
I don’t know what sort of GPU you have. You might want to share your set-up, for instance the output of inxi -zv8 might help to find someone with a set-up similar to yours.
Remember to format the output properly as described in [HowTo] Find system information
(for instance paste the inxi output, highlight it, and use the </> in the message toolbar)