After fat grafting to the breasts, should I have worn a brava type device? At 3 months am I looking as my retention rate?

Hello, I had fat grafting to the breasts 3 months ago - 200ml, to try and add a bit of lost volume following implant removal (explanted a year ago) as I previously had implants I had a bit of room for the fat to live, I'm since wondering should I have used a brava type device to help with the fat survival -- If so, is it too late to try now? At 3 months post op, is the fat I have left in my breast now mine ? Thanks for your time