my two favorites are:

https://www.amazon.com/gp/aw/d/B07954XGNT it’s super stretchy, lightweight, and breathable. the longline style keeps far away from your incision sites

https://www.amazon.com/Anita-Lynn-Mastectomy-Bra-Lotus/dp/B07V3FP1VM this or any similar seamless microfiber in a longline style is super comfortable