Moving this to the Trans forum for visibility and more in line with content, even though it's not a review. As always, keep the phobia and hate to yourselves.
The question itself is not phrased that well. Basically all penises on these providers are real flesh and blood so long as they are pre-op. Not all are "fully functional". Whether or not it's fully functional is a complex mix of personal choice, their treatment regimes, hormones and level of surgical intervention. Ask the question, politely and very sensitively and realize that you are dealing with a human being, they are not machines. A review found elsewhere on the internet criticized a trans provider for not ejaculating during the session, her response was to post a video of her blowing a rather massive load and saying that while he was unable to make her orgasm, that was a comment on his abilities, not hers.