I installed the app from SideQuest and was able to log in and enable a number of sensors, but at the top of the Companion App page, it says it doesn't have permission to send notifications. Pressing the button to take me to settings takes me to the Quest Settings app notification page, but the Home Assistant app isn't listed there.
If I open the Android Settings app and go to the Apps section, I can see the Home Assistant app and have given it every permission including notification access with popups and ignoring DnD. Even so, notifications won't pop up on the screen and only silently appear in the notifications tab of the floating menu