28 year old male. Mini-lift, filler, or something else to address sagging face/cheeks? (photo)

I would suggest micro-needling with radiofrequency to improve overall skin health and to tighten. This can periodically be done to help maintain your tightness and results.

Unfortunately, you have not provided a lateral view. You may benefit from a chin implant that will tighten some of the lower face. You may also benefit from a lip lift. A lip lift does 4 things: shortens the distance between your nose and upper lip, increases the mucosa of the upper lip, increases the incisor show and pulls up the corners.

Best Wishes,

Gary Horndeski, M.D.

I would recommend considering a mini facelift using the SMASectomy technique. This procedure effectively targets early sagging in the cheeks and the creases around the mouth and eyes, providing a refreshed appearance without looking overdone.
This procedure involves two incisions; the first is a simple skin incision at the temporal hairline, down to the front of the ears, and ends at the earlobe. This operation tightens excess skin and relies entirely on tension to shift the underlying facial soft tissue. The second incision is near the lower eyelash. In this area, the excess skin will be reduced to balance for lifting and tightening the cheek muscles.