Yes, Moto Z2 Play does have fm radio.
Yes, Moto Z2 Play 64GB comes with latest 7.1 Android OS so you may not require to update it immediately but going forward, company will produce OTA updates.
Standard packaging includes Mobile Phone with in-built battery, FREE Style Mod, USB Type C Cable, USB Power Adapter, SIM Ejector Tool, User Manual and a pair of Headphone.
Yes, Moto Z2 Play does have the memory card slot.
Moto Z2 Play SAR value are as below:
SAR Value (Head): 1.455 WKg/1g
SAR Value (Body): 1.24 WKg/1g