No USB and Ethernet

[Zoroaster-Z]

Are you booting from SD. What USB peripherals have you connected to the board. What power supply are you using. What I do suggest is burning an image of LibreELEC to an SD card and trying that. It's a compact OS, boots quickly and will allow you to test both USB and Ethernet ports quite quickly.

Here's a link to the image download. Make sure you select the RockPro64 image. https://libreelec.tv/downloads/rockchip/

•  As per the reference given;-- Power supply used | (EG: 5V 1A RAVpower): Lab PSU set on 12.0VDC with limit of 5A

1. -- Connect the sdcard and invoke sudo dd if=path/to/DietPi_ROCKPro64-ARMv8-Bullseye.img of=/dev/DEVICE conv=sync status=progress && sync to install the OS on the sdcard

1A seems like pretty skimpy power.  RPi usually runs reliably with 3A.

Why disable SPI?  ... "There is a second possibility to jumper your ROCKPro64: If you mess-up your SPI and are unable to boot, jumpering pins 23 (CLK) and 25 pin (GND) on the PI-2-bus header will disable the SPI as a boot device. You have to remove the jumper 2 seconds after having started your RP64 (before the white LED turns ON) otherwise the SPI will be missing and you won't be able to flash it. Ayufan images contain (at the moment) only one script for the SPI and the RP64, it's "rockpro64_reset_spi_flash". Other SPI scripts are dedicated to the R64 (as it is written on the name) and it will mess-up your RP64 SPI if you use them."

Have you tested WITHOUT this?

When it's running for awhile, to the WiFi-BT module and the USB chip get warm at all  (or overheat)?  I've had USB go out when chip overheats without heat sink.  Are all the USB ports tested?