Will my midface go back to its original position or will it sag ever further due to stretch? (Photo)

Although I’m not a fan of the midface lift yours actually looks really good. It will probably continue to settle with time. Don’t be in any rush to have it reoperated

So midface procedures typically have some relaxation even after 6 months. I would recommend waiting for at least a year prior to trying to push your cheeks down. For a conservative approach, if an endotine was used, sometimes focal kenalog can be helpful. Speak to your surgeon and consider waiting to see if there is some improvement over time.

It would be very helpful to see your before photos(same view)
I would suggest not reversing the surgery as it may accelerate midface aging because your periosteal attachments have been released
Instead i would suggest (permanent) fat grafting to the lower and lateral cheek making the cheek prominence look less localized
Hope this helps