OnePlus 5t (dumpling) Volume/Power keys don't work in UEFI

[wolfinabox]

Prerequisites

• Have you read the wiki?
• Is your device in the supported list?
• Does the device have a Snapdragon SOC which is supported in this repo?

Description

Volume/Power keys on OnePlus 5t (dumpling) don't work in the UEFI boot menu, which prevents navigating the menu.
(No messages/errors show upon pressing, there's just no response. The device automatically boots into the EFI shell after the timeout)
Tried release 2301.1 as well as compiling 880e010 from source, no dice.
The volume/power keys do still work in Android, and the power button works to go past the "This boot loader is unlocked" screen before booting, just not in the edk2-msm UEFI.
Wiki says UEFI buttons should be supported, so not sure if I've done something wrong, or there's an issue.

Happy to test/provide any other info that's needed, as I'd love to get this running on my old phone.

[qaz6750]

• We need to fix buttondxe for it

[shenghuang147]

Yeah I'm having the same problem.

[NetuserPRO]

@shenghuang147 worked for me before my op5t broke

[shenghuang147]

• We need to fix buttondxe for it

I used Cheeseburger's ButtonsDxe and the buttons worked fine.