Need help with Sipeed RV Debugger

Hello everyone, I’ve some problems to understand how to use the Sipeed USB-JTAG/TTL RISC-V Debugger. I wanted to use it mainly for swd programming in Keil and openocd, I thought the PC would recognize the debugger as an ST-LINK or something similar, but on Windows I only see a FT2232D device, so a dual COM device.
From instructions the supported software versions are:

  • ST-LINK Utility 2.0 and 4.2.1 above
  • KEIL RVMDK V4.21 and above

But neither the ST-Link Utility (no ST-LINK detected! message), nor Keil (no debugger found) can recognize the device. I think there may be a way to use it in openocd, but I don’t know how to set the .cfg file correctly.
I think I’m missing something; can someone help me to better understand how to use this debugger?