In playcanvas, place predictive markers

Hello, I am developing a project in playcanvas using the 8th wall sample project, and I would like to use some of the 8th wall features, like the predictive marker before the AR model appears, in playucanvas.
But I don’t know how to do it. Can someone please tell me how to do this?

Can you share a photo/video reference of what you’re trying to build?

The mechanism we want to create is similar to this game.
We want to put markers on the ground to predict where the models will appear.game

Could something like floor surface prediction be achieved in playcanvas?