U-boot (EFI) and grub menu access

Is it possible to enable USB keyboard access during u-boot handoff to grub? I’m trying to setup a dual boot sd card on a sweet potato and everything works except for one thing:
When the grub menu pops up for me to select the grub entry I want, I do see it in both serial uart console and over HDMI but can only interact with it over the serial uart connection. I’d like to be able to interact with it using the usb keyboard connected to the SBC if that’s possible.

You should be able to use either keyboard or serial. Does the boot sequence detect your keyboard? What make and model is your keyboard?

its a generic wireless keyboard connected via a proprietary USB dongle.

description: Keyboard
product: MOSART Semi. 2.4G INPUT DEVICE
vendor: MOSART Semi.
physical id: 1
bus info: usb@1:
logical name: input5
logical name: /dev/input/event0
logical name: input5::capslock
logical name: input5::numlock
logical name: input5::scrolllock
logical name: input6
logical name: /dev/input/event1
logical name: /dev/input/mouse0
logical name: input7
logical name: /dev/input/event2
logical name: input8
logical name: /dev/input/event3
logical name: input9
logical name: /dev/input/event4
version: 1.25
capabilities: usb-1.10 usb
configuration: driver=usbhid maxpower=100mA speed=12Mbit/s

The controller is garbage and don’t follow USB HID spec fully. It won’t work until Linux which has quirk handling code.

Get something from a reputable brand.