I installed 24.04 on a Volla Phone 22 which had a clean install of 20.04. The installation of 24.04 went smoothly.
I tried to install Waydroid with Gapps, and you get into the Waydroid session, it starts complaining that it is not certified for Google services. This hasn't happened to me with any of the Waydroid with Gaps installations I tried in 20.04. It looks like a Waydroid issue though, not sure if it is related to the fact that Waydorid is now running in 24.04.