Yeah, the shoulders would have to be very highly conditioned to do it, but I'm sure if there is someone who could do all 3 one arm levers perfectly then their shoulders can probably handle it. It can be thought of as a OA 360 pull, but rotating on a different axis. This move is where your body stays horizontal in a lever the whole time while rotating the body sort of like how you can rotate your torso up or down in a horizontal human flag. The theoretical OA 360 pull you were talking about is probably even harder.
You can even train OABL this way by starting in the sideways OAFL and rotating the body more down to as far as you go before eventually being strong enough to get to a perfect OABL if you have the sideways OAFL, but not the OABL. This should also work for training the other OAFL too if you rotate body upwards. I'd imagine this method is not better than lowering from reverse meathook and meathook for training the OABL and 'body up' OAFL respectively though.