I’m nearly nine months post op and my surgeon stressed nor ro wear push ups for at least a year. This is because wearing a push up bra pushes the implant up and inwards which leads to displacement I.e. Shifting them out of place which can damage how they sit and look.
Go ahead by all means and wear push up bras if u want but be aware of what may come of it. I very much doubt surgeons give warnings or advice for no reason having studied for several years in their profession.