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

https://github.com/anddam/void-packages feature-update-brother-brscan3
https://github.com/void-linux/void-packages/pull/22998

Update brother-brscan3 package
Bump version to latest available binary blob from manufacturer.
Drop building debug package, libs are stripped at the source.
Make description like brscan4 package, since this package targets for
multiple Brother devices.
Avoid repetitions when assembling distfiles URL.

A patch file from https://github.com/void-linux/void-packages/pull/22998.patch is attached