How to use WEBUSB API with micropython ? (board = PORTENTA H7)

[patfrench]

Hi,
I saw this project that works with WEBSERIAL : https://jeff.glass/post/pyscript-webserial/

I tried WEBUSB but the card must be linked with the WINUSB driver.
My PORTENTA card is linked with USBSER.

With Zadig I can change the USBSER driver to WINUSB but I'd like to find a trick so that WINUSB loads by default.
It seems to me that with the right descriptor it's possible but I don't know where to start.

I don't want to access the REPL, I want to make a USB/UART converter that works with WINUSB to make webapps.

Thanks in advance