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

https://github.com/newbluemoon/void-packages po4a
https://github.com/void-linux/void-packages/pull/21932

po4a: update to 0.58.1
and add a missing dependency

A patch file from https://github.com/void-linux/void-packages/pull/21932.patch is attached