With oculus link and airlink there might be an issue reading the actual boundary (I have a version that allows to set the play area manually although this is done without the passthrough (I have to check if something about it has changed and it is possible to use it by the game) so it's adjust-peek-repeat.
As for the standalone quest you have to set the boundary (non-stationary, just as you did) and then run the game. Maybe try forcing app to close and reopen it? There should be code that avoids doing so but maybe it doesn't work for some reason. There's not much that can be done by the app as it just asks OS/VR system for playarea size and if it can't get it, there's even no reason why it was impossible to do so :(