Increasing facial asymmetry, what can fix this: ptosis or braces?

It appears your left side of the face is smaller which includes smaller left orbit (eye socket) with droopier upper eyelid and brow. Improvement is possible to some extent. There are both nonsurgical and surgical options available. Need personal consultation.

With regards to the teeth, an appointment with an orthodontist is best. Based on the photo, the left side of the face seem to have the asymmetry. An upper eyelid blepharoplasty may be beneficial to reduce the appearance of the droopy eye on the left, with possible fat graft on the left cheeks to even it out with the right. However, it would always be best to schedule an appointment with a board certified plastic surgeon for an in person examination and a detailed discussion of your surgical options.