Is there a procedure that could be done to lower the subnasale and shorten the philtrum?

Yes, it is possible to lengthen a nose, and thus shorten the upper lip. This does require adding cartilage to extend the septum. There are also lip shortening procedures such as a lip lift that can be performed.

If you want your philtrum )part of the upper lip) shortened you can get a lip lift although I’m not a fan of the procedure.,I think you need to have a consult to determine what needs to be done in your situation. It sounds like you’re over analyzing what needs to be done.