I’m kind of slow this morning.
I don’t get his question.
Are we talking about Protestants who are married to Catholics and attending Mass out of loyalty to their spouse? Or kids who have left the Catholic Church, but are home for the holidays attending Mass for the sake of their parents (and planning on attending a Protestant worship service later in the day)? Or are we talking about Protestants who are attending a funeral or wedding at a Catholic church?
Other than those examples, most Protestants are never in a Catholic church or attending a Mass, so of course, they have no desire to receive the body and blood of Christ in the Eucharist. They don’t even think about it. Many don’t even realize what Catholics teach.
If non-Catholic Christians attend church at all, they are busy enjoying their own worship service and their own celebration of their “ordinance” of communion in their own church, and not thinking at all about Catholic churches and “Eucharist.”
Keep in mind, also, that many Protestants, especially those who attend non-denominational and Evangelical churches, don’t have communion services more than a few times a year. The last Protestant church that we attended (E Free) celebrated communion 4 times a year, and always during a Sunday evening worship service, which had the lowest attendance of any of the Sunday services. (Yes, I know that the Campbellite churches offer communion at every meeting, even the business meetings, and I also know that several of the Mainline denominations celebrate Communion often and also that some consider their communion elements the True Body and True Blood of Jesus Christ.)
So I don’t get it. To me, this question is like asking if a vegetarian wants to eat meat.