Unfortunately, the grill pan is NOT suitable for Airfryer XL, but only for the smaller model. It is impossible to mount the grill pan, because even distinguishes the technology here between two Airfryer models. So you have not even the option that (small) grill pan to operate in large Airfryer.
A practical test was thus not possible, unfortunately, otherwise we keep the pan for a sensible supplement. I hope you will soon be there for the Airfryer XL.