I am a cradle Catholic who often attends an Episcopal church.The parish has two priests -  together they are the best real-life example of true complementarity in the church that I have personally experienced, since one priest is a woman and the other is a man. Both are outstanding priests.  Some call the male priest "Father", but most simply call him Paul.  Nobody calls our female priest "Mother', but I have heard of it being done - rarely.  She prefers that we  use her first name. I have not personally heard "Mother" used in any of the Episcopal parishes I have visited.  The use of "Mother" does not seem to be common, and some Episcopal protocol experts avoid it completely because they consider it "cringeworthy". In introducing the priests, the commonly used form is - "I would like to introduce the Reverend  Firstname Lastname."

Generally "Reverend" is not used to directly address a priest - not "Hi Rev. Smith, how are you?" but "Hi, Paul,...