Bookmarks from Desktop not appearing in iPhone (TestFlight)

Not sure if this is a bug or a feature that is yet to be implemented.

I bookmarked a node (row?) in macOS desktop app.

Then opened the app in my iPhone and don't see it in the sidebar.

Thanks for reporting this. The TestFlight beta and App Store versions use separate data environments, so data isn’t shared between them. This may explain what you’re seeing.