Is there a way to stop hemorrhaging during surgery if you are on Xarelto?

Commonly, when your INR (blood clotting capacity essentially) is higher than about 1.4 they will have fresh platelets ready to infuse in the case of unusual bleeding. These people know what they are doing. RF ablation should not cause bleeding in any case.

Yes there is. It is called Andexxa (coagulation factor Xa [recombinant], inactivated-zhzo). It is the first factor Xa inhibitor antidote indicated for patients treated with rivaroxaban (Xarelto) and apixaban (Eliquis), when reversal of anticoagulation is needed due to life-threatening or uncontrolled bleeding. Your doctor can also consider using 4-factor PCC (KCentra) 50 units/kg (maximum 5000 units). The half-life of Xarelto is 5-13 hours depending on your age. Your doctor may ask you to not take your last dose before the procedure. All of that should be discussed with you in the days leading up to the procedure. If not, call and talk with your doctor.