UPDATE 2 Nov 2023: Check out the article...
The First Batch of Ox64 (Oct 2022) won't appear as a USB Serial Port when connected to our computer because...
"The bin file that currently loaded in Ox64 still initialize and not response to UART or USB, however, it will setup the BL808 internal PMU and this is how product team aware that Ox64 board is working. This is the bl808_demo_event.bin file attached here.
"For UART output log file, you can try to flash whole_flash_data.bin file attached here."
"I also attached the guide on using BL808 programmer utility "BouffaloLabDevCube-v1.8.0" software."
"For the BouffaloLabDevCube-v1.8.0.zip, you can download using this link:"
I flashed whole_flash_data.bin at 115200 with a cp2102 at 115200. OX64 logs data out the UART (pins 1 and 2) at 2000000