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

https://github.com/pbui/void-packages xfce4-panel
https://github.com/void-linux/void-packages/pull/14882

xfce4-panel: update to 4.14.1.
Adopt package.

A patch file from https://github.com/void-linux/void-packages/pull/14882.patch is attached