Low throttle hover, MAG issues, and DSHOT600

First flash the Bdshot version of firmware for that board and configure it. No reason not to use that. And Dshot600 should be no issue. I have 2 of those FC’s with 2 different 4in1’s and that’s what I configure for.

Ah, that’s a BLHeli_S ESC. I would not have bought that one. You will need some firmware on the ESC to attempt to get that working. I’m not sure if Bluejay is supported. Long thread about it:
Bluejay