Is the reality of healing Muslim and non-Muslim patients at the hands of a Coptic monk or priest true or false, and is it permissible to go to this priest in the church for the healing of the sick?

It is not permissible to go to a church to seek Ruqyah or treatment from a priest or monk, due to the doctrinal corruptions involved, and because their Ruqyah is often not free from polytheism (Shirk).