@Rizwan Assad Thanks for posting in our Q&A.
Based on my research, WUFB doesn't support to update servers. Windows Update for Business is a free service that is available for the following editions of Windows 10 and Windows 11:
Pro, including Pro for Workstations
Education
Enterprise, including Enterprise LTSC, IoT Enterprise, and IoT Enterprise LTSC
https://video2.skills-academy.com/en-us/windows/deployment/update/waas-manage-updates-wufb
From intune's point of view, intune also doesn't support to manage servers.
Hope it will clarify something.
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