400cc over the muscle in November 2022. Are my breast implants sagging? (photos)

Dear Ann12398,
I understand your concern. However, without a proper assessment, it would be difficult to determine is there wrong. It is best that you visit your plastic surgeon for further assessment or ask for a second opinion. Only after a thorough examination, you can get proper recommendations and advice.
Daniel Barrett, MDCertified, American Board of Plastic SurgeryMember, American Society of Plastic SurgeryMember, American Society of Aesthetic Plastic Surgery

Hello,
The breasts are sagging, and the implants are positioned too high. This is called a "waterfall deformity". In a waterfall deformity, the implant is positioned much higher compared to the nipple-areola complex, and the loose breast tissue sags over the implant like a waterfall. To prevent this complication, implant selection and planning before surgery are important. It's essential to check whether the skin between the nipple-areola complex and the lower breast has been efficiently filled by the implant after surgery.

You are not sagging, but you may sag over time since breast tissue itself does not support the weight of implants. Placing the implants behind the muscle does give some support. Your breast naturally do sit somewhat low on your chest and your bases cannot be moved. You are fine for now.