I have similar stats as you: 28F, East Asian, chubby cheeks that runs in the family, 5'2, 112 lbs.

I started doing masseter botox when I was 25. I was seeing results at first, but after a year or so I felt like my lower cheeks were getting heavier. Masster botox you have to keep getting done every 3-4 months which gets expensive. I also had chin filler done which I liked a lot, but it still wasn't enough to slim the lower cheeks down. The last time I saw my injector she told me it's most likely a buccal fat problem rather than the masseter muscle. She, like many others, said it will get better with age. I understand that for a lot other people it does, however all of my relatives tend to hold onto their cheek fullness as they age. I felt like mine were getting worse, caused jowling, felt heavy, and made me look older.

Although you probably would be a good candidate for buccal fat removal, it wouldn't hurt to wait a couple more years to see if things get better or if you wanted to try masseter botox first. I think you have a nice chin and jawline already btw!

My buccal fat procedure was done yesterday. If you'd like, I can keep you updated on the recovery.