There is a new pull request by CameronNemo against master on the void-packages repository

https://github.com/CameronNemo/void-packages wshowkeys
https://github.com/void-linux/void-packages/pull/24819

New package: wshowkeys-git.
If drew ever marks a release, this will be ready.

A patch file from https://github.com/void-linux/void-packages/pull/24819.patch is attached