Hi avilavinash-2191,
Thanks for your posting on Q&A.
In my opinion, WSUS is not yet ready to implement the features you mentioned above. In the disconnected environment, we could only use the wsusutil.exe tool to import and export the updates.
If we access to the Microsoft Update Catalog website manually, any updates that we download are not imported into the WSUS server, but instead are downloaded as individual *.MSU files. WSUS does not currently have a supported mechanism for importing files in the *.MSU format.
Reference link:
https://learn.microsoft.com/en-us/windows-server/administration/windows-server-update-services/manage/wsus-and-the-catalog-site
Thanks for your time.
Regards,
Rita