EspTinyUSB
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Full Speed mode on Descriptor
Esp32s2 is full speed mode only, so variable _bcdUSB on EspTinyUSB constructor must be 0x0110
https://github.com/chegewara/EspTinyUSB/blob/7eba91d1d5569324383e8e89d717d2714c129350/src/esptinyusb.cpp#L114
WebUSB requires bcdUSB to be 0x0210, but of course you may be right.