Accessing Peripherals via a Flutter-Pi app

Inspired by the Seeed article " Build Your Own UI Using Flutter", I’m wondering if and how it’s possible to access a USB peripheral that’s connected to my Pi Zero 2 W.

The Pi has a USB hub with Keyboard/Mouse and a “TEMPerHUM” (temperature/humidity sensor). I think it’s an HID device, but not sure how to get Flutter to read from it. Not sure if I’m using the right packages (ex. gpiod 3.0.1 vs flutter_gpiod 0.5.0)

Or if there’s any Flutter experts out there… before trying on the Pi, I tried testing things via a Flutter Desktop app, but couldn’t get the ‘FFI’ to call the functions in my 32-bit DLLs.