Hi @Lokesh Dharmappa ,
Thank you for posting in this community.
I looked up the information and I'm sorry to say that there is no centralized setup for managing the sync button for the entire farm in SharePoint Server Subscription Edition.
We can only hide the sync button by manually disabling the Offline Client Availability feature for each site.
We are always looking for ways to improve SharePoint, and your feedback and suggestions are very valuable. We suggest that you can make suggestions on this SharePoint Feedback portal to further optimize the management of the sync button on SharePoint Server Subscription Edition at web application level. Your contribution will be highly appreciated.
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