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

 New package: xnotify-0.8.1
https://github.com/void-linux/void-packages/pull/27198

Description:
- New package: xnotify-0.8.1
XNotify displays a notification on the screen. XNotify receives a notification specification in stdin and shows a notification for the user on the screen.
Among the features that also stand out is that it has support to show images