OK, I’m kind of hyped with this! What you see on the image looks like an any other flight controller, right? Looks again! It’s not STM32 but ArteryTek AT32! And F435 as a bonus 😉 With the continuing chip shortage supply of STM32 is limited and prices high. Maybe have an alternative source of MCUs will help. What you see is a NeutronRC F435 with AT32! For now, it runs a special fork of Betaflight.

ArteryTek AT32 Flight Controller