19 - chubby face that doesn't go away with diet or exercise. Buccal fat removal or cheek lipo?

For facial slimming, lower face (inner) liposuction is usually the first and safer step, as it targets superficial fat and preserves facial support.Buccal fat removal can be added selectively in very carefully chosen cases, but it must be conservative—especially in young, lean patients—to avoid over-hollowing over time.Bottom line: A conservative lower face/chin liposuction, with very selective buccal fat removal only if truly indicated, offers the most balanced and natural contouring when planned carefully.

At 19, your facial structure and fat distribution are still developing, even if your body weight is low. Because of this, it is generally too early to recommend buccal fat removal, cheek liposuction, or combining multiple fat-reduction procedures.
From your photo, there is no clear indication that buccal fat removal is necessary. Removing facial fat at a young age can increase the risk of an overly hollow or aged appearance later on.
Rather than deciding between buccal fat removal and cheek liposuction at this stage, it would be more appropriate to wait until your facial proportions have fully matured and reassess then with an in-person consultation.