No, nobody has PT because it isn't possible. Apple in their infinite wisdom made an MR platform and did not give developers any access to the camera feed. I don't mean "by default" I mean there is no way to get it, the user can not enable any permission to allow an app to access the camera feed. Thus it is IMPOSSIBLE right now to make any app that uses the camera image, such as a passthrough video player or anything else.
The only possible way this could work is if you can make the video itself simply have transparent parts and let the platform do the rest but I don't think that is doable either.
In the larger picture, as a developer that had a lot of ideas I wanted to try with this thing outside of porn, I REALLY hope Apple realizes how stupid this is. I know they did it for privacy but at least let the user choose to make that available to an app with permissions if they want to.