Do the whispers of Satan enter into the الاستخارة prayer?

If the question is about the occurrence of satanic whispers (waswasa) to someone performing Salatul-Istikhara, the answer is that there is no impediment to it. It has been established that Satan whispers to theperformer of prayer to prevent them from attaining khushu' (devotion), and it may even lead to them losing count of the rak'ahs (units of prayer). The most important cure for satanic whispers is to disregard them and not dwell on them.