LGR Blerbs | USB4VC - Using Modern Input Devices on Old PCs @LGRBlerbs | Uploaded February 2022 | Updated October 2024, 1 day ago.
Testing a prototype of the USB4VC by dekuNukem, a Raspberry Pi-based board with modules allowing you to connect new USB devices to retro computers. 15-pin game port, serial, PS/2, ADB, and more (in the future) can all be paired with modern peripherals and controllers. Like PS5, Xbox Series X, Switch, and so on. It even converts to XT keyboard protocols! Neat!

Pertinent links:
github.com/dekuNukem/USB4VC
kickstarter.com/projects/dekunukem/usb4vc-usb-inputs-on-retro-computers