Using QSPI-Flash on weact studio stm32h743vit6

Hi,
I’m very interested on the weact studio stm32h743vit6 board, and I’ve already learned from another post, what’s it all about with the fragmented RAM.

My question goes to the additional flash. The board has 8Mb QSPI flash and another 8Mb flash (single speed SPI, I assume…).

Can I use the QSPI flash for additional program-space? How?
And how can I use the other 8Mb flash? I.e. with LittleFS, …

Some links:
https://github.com/WeActStudio/MiniSTM32H7xx
https://docs.platformio.org/en/latest/boards/ststm32/weact_mini_h743vitx.html

Thanx