Hello,
We have just updated this on our end.
Can you please delete your Intune Application / Update for Node.JS, and then run a sync in the Publisher to recreate the app?
Node.JS NON LTS should now only update a version 14 install. So the Node.JS app will not update the version 10, or version 12 versions of Node.js.
Worth noting, it will also not update a version 13 build.
Let us know if this solves your issue.