Is it normal for one cheek implant to still be very swollen 10 months out from surgery? (Photo)

It would be very difficult to give you good advise without in person evaluation. It can be a small seroma around implant, implant displacement, rotation, etc. CT scan may be the way to check position of the implant? Discussion with your surgeon is best way to proceed with fixing the problem. Good luck.

Based upon the series of posed photos your cheek implants show significant asymmetry. I would order an ultrasound examination of both cheeks to compare if implant slipped or was placed in different position vs fluid/scar collections. After that examine and in person evaluation then a surgical plan can be determined.