What is the largest CNN network applied onto an STM32 board with CubeMX AI?

I saw this video. He say that in these ST boards, they have a trained model that can classify 8 faces.

https://www.youtube.com/watch?v=Wzgfm5BH4qY

What is the largest CNN network applied onto an STM32 board with CubeMX AI and how many objects could it classify?