New versions of X-Road are published 2-3 times a year. The release notes are available here:
https://nordic-institute.atlassian.net/wiki/spaces/XRDKB/pages/4915426/Release+Notes
The backlog is available here:
https://nordic-institute.atlassian.net/browse/XRDDEV
Information about the upcoming releases and the X-Road development roadmap are available here: