The registers list varies based on the active target. For processor targets, the registers list includes processor registers like general purpose register, PC, SP, LR, special registers, banked registers and so on.
For non-processor targets like APU/RPU/PSU/Versal, the registers list includes registers from all the peripherals in the SoC. For example, peripherals include DDRC, UART, SPI and so on.
Registers are grouped wherever applicable. Such registers can be accessed by running mrd/mwr <register-group> <register-name> ?value?