Nice! glad you got it working! We should be getting to the update of the UART peripheral very shortly that would make it a bit easier to work with, especially without having to rebuild the library constantly.
The documents on this page are the most up to date for the processor itself. The daisy uses the STM32H750IB variant. The datasheet will have the tables with all of the alternate functions for each pin, the reference manual has specific info on how the peripherals work and what they can do. Sometimes things are named just differently enough between the reference and the ST HAL to be annoying, but if you’re using VS code or some other editor with intellisense. it’s pretty easy to bounce around and find the structs/values you need to configure stuff.
There is also a csv pinout file for the Daisy that contains many of the alternate functions as well.
Hope that helps a bit 