Official comment
So many users complained that it was taking up space on the screen that we added an option to hide it:

Comment actions
I'm having a problem with Mobile Library Sync.
I'm using Rekordbox 6.3.0, MacBook Pro, and iPhone 11
Both devices are connected to the same network.
In this official video tutorial it says to press Search Mobile button.
But this button isn't showing up for me, as you can see in the screenshot below.
Any suggestions?

So many users complained that it was taking up space on the screen that we added an option to hide it:

Post is closed for comments.
Hi,
My Rekordbox is up to date (5.837) but this option does not exist (see pick below).
Could you please help me ?
Paul

Mobile sync is not available in rekordbox 5.