Here is the version history. As other comments mentioned, last release was 5 days ago: https://microsoft.github.io/reactxp/versions/version_history...

No one really keeps github releases up to date. If you look at their package.json, 1.40-rc.2 was released 5 days ago.

reactxp on NPM was last published 5 days ago. It seems they stopped publishing releases to github.

https://www.npmjs.com/package/reactxp