There are quite some FM4 MCU derivates marked as terminated ( S6E2CCAH0AGV2000A @ arrow). Does cypress provide a reliabe roadmap for FM4 products?
FMx device is not recommand for any new design or even existing design with samll volumes. The product line has not been promoted or maintained. The devices would not be available once if it's marked as terminated.
You can consider PSoC MCU instead.