How to track a marker pose since it's first detected and tracked?

Hi everyone,

I would like to track a pose of a marker without its presence after it got detected and tracked. It that posible?
Simply like this, after a model popped onto the marker, I would like to fix the model there and not using marker anymore.

I simply tried

1. Clone a new model at the marker position and leave it there
2. Add model pose into another AnchorManager
Both are not working as I expected. Feel like the model is still there but when moving camera phone close or far, the model got moved as well.

Thank you all for your ideas and comments