Released 2019, September 21 483g (Wi-Fi) / 493g (LTE), 7.5mm thickness iPadOS 13.1, up to iPadOS 14.2 32GB/128GB storage, no card slot
3.7%1,103,933 hits
10.2'
1620x2160 pixels
8MP
3GB RAM
Apple A10 Fusion
8827mAh
Apple Products iPhone iPad Apple Watch AirPods Mac notebooks Mac desktops Apple TV Accessories Beats by Dr. Dre iPad Pro (12.9-inch) From: $939.93 iPad Pro (12.9-inch). For ipad, I understand the letter M and F in the serial number represents New and Refurbished respectively. I cannot confirm or deny your information about the M or F model ID number or serial number letters since both numbers can contain one to three letters at the beginning one of these model ID/serial numbers and letters at the end.
Also known as Apple iPad 7th Gen, Apple iPad (7th generation) Wi-Fi + Cellular & GPS: A2200, A2198 (Global) Wi-Fi only, w/o GPS: A2197 (Global)