There's a merged pull request on the void-packages repository

xfce4-4.16
https://github.com/void-linux/void-packages/pull/27367

Description:
Updated core xfce4 packages to 4.16.0 as listed here: https://gitlab.xfce.org/xfce.  [ChangeLog](https://xfce.org/download/changelogs/4.16/)

Built and tested on x86_64.  Also built for x86_64-musl (but didn't test).