Focus on TFT screen

I'm thinking of only designing for the TFT variant of Tetrinsic 2.0 and only doing the COB LED strips (one on each side) either if the need arises or it's actually super easy, barely an inconvinience to implement.

For PWM driving the backlight, it sounds like an N-Channel MOSFET is what I'm looking for.

Cheaper angle sensor found

Both chips are full-bridge sensors. The TLE5501 is an 8SOP chip though. Hopefully though, I'd have enough PCB space.

Flash

I searched on Google what the general consensus was for picking RAM and FLASH values for microcontrollers, and it was recommended to pick the highest possible when regarding a hobbyist project (with the option of scaling down later).

With that in mind, I'm going to use a 16MB FLASH chip. Searching around AliExpress, all the RP2040s use a W25Q chip. I'll likely use the smaller package option:

Conclusion

I think I have enough data that I can start modelling a solution.