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

https://github.com/andkem/void-packages update-haproxy-2.2.2
https://github.com/void-linux/void-packages/pull/24670

Update haproxy to 2.2.2 and enable Prometheus support
Update haproxy to 2.2.2 and enable Prometheus support to allow for configuring export of statistics.

A patch file from https://github.com/void-linux/void-packages/pull/24670.patch is attached