Thanks for sharing data on the BMS Evan. The RP2040 device is indeed used (RP2-B2 marking).
The ESC uses UART and the Display looks to connect over SPI. There are 2 total UART instances available on the RP2040, so one should be remaining if there are enough proper pins left. If these are not routed out, this could be a problem as the RP2040 IC is rather small (hard to blue wire to 
) A full schematic would still be helpful.
Another possibility is to use a separate microprocessor that collects the BMS Data, and acts as a bridge between the hand throttle and ESC.
Also I found some documentation on the DALY BMS UART protocol:
Christian