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

New package: etesync-dav
https://github.com/void-linux/void-packages/pull/20559

Description:
Etesync is an end-to-end encrypted contacts, calendar, and tasks synchronization service. The etesync-dav bridge runs a local dav server on your machine to give you access to your contacts and calendars on the desktop. This PR adds the package to Void Linux and the required dependencies which were missing in Void.