Is there a procedure similar to a lip lift that can be done from inside the mouth to increase tooth show?

There is no other procedure to show more teeth without an external incision. You’re correct, a V-Y plasty would not increase dental show!
If done well, the external incision should never be visible to others. It can be further hidden with lasers postoperatively

For unique cases where a variety of modalities could be used to treat the condition, I would suggest an in person or virtual consultation to develop a custom and effective treatment plan. It is difficult to precisely define the best option without collecting the same information. I suggest reaching out to an expert for a consultation with surgical and non-surgical methods to get a comprehensive option. Best, Dr. Emer.

Hello, that's a great question! To my knowledge, there is not an alternative procedure that can achieve what you are describing. One of the essential aspects that makes a lip lift 'work' (increasing dental and vermilion show), is skin excision. The vector of pull on the external aspect of the lip rolls the vermilion outward and upward. Lip augmentation (V-Y) can increased the vermilion lip and projection (creating pout), but would not be expected to increase dental show. As an aside, a well-executed lip lift will result in a scar, but it can be minimized with proper surgical technique. Furthermore, scar modulation can be performed afterward if needed to help it heal with minimal visibility. Good luck!
Cheers,Dr. Tower
Best,Dr. Tower