I am a super early bird backer of the VisionFive 2, and I cannot get either the 55 or the 69 version of the StarFive Linux image running on the StarFive. The led green led never turns on. I have tried refreshing the firmware using this method VisionFive 2 Debian Image Released - #75 by kesmik, and it worked, but I still cannot boot into the 55 or 69 image. The only image I can boot into is the build root image.
For more help you really do need to be clearer than “I still cannot boot”, that does not help to narrow things down. If you disconnect the monitor and power up the board and leave it for say 5 minutes do the LED’s on the network port light up if you connect a cable. Do you have a 3.3 volt usb-ttl serial cable (or a RPi and 3 wires to use as a serial debugger).