Hello again, coming back with updates.
I have decided to switch to STM32H757 MCU. It is slightly more expensive, but the added security justifies the small added cost.
In another order, below is the M.2 edge pinout. In the center, the MicroMod standard pinout is shown and on the outsides are the assigned peripherals.
Thank you for the interest and I will keep you posted with the updates as I go!