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Check this project out, while not USB since your MCU can act as host, you could make it run over bluetooth. https://github.com/lemmingDev/ESP32-BLE-Gamepad
There is a software only library for USB1.1. I have not tested it but it should be usable. https://github.com/cnlohr/espusb
NOTE:
The number of mentions on this list indicates mentions on common posts plus user suggested alternatives.
Hence, a higher number means a more popular project.