There is an updated pull request by anjandev against master on the void-packages repository

https://github.com/anjandev/void-packages grub
https://github.com/void-linux/void-packages/pull/22250

New package: grub-btrfs-4.3
closes  #21581

A patch file from https://github.com/void-linux/void-packages/pull/22250.patch is attached