It's a 32bit ARM CPU running around 200mhz I think. I'm sure they just used a similar ARM CPU.

STM32F7 with a Cortex M7. I don't think they've announced what they are moving to, except that it's a variant with better availability.

You would think in that long interaction they could have provided some actual details, yet they spend so much space repeating themselves and acting like their customers are small children.