Hi there,
All of the relevant policies are under the path Computer configuration > Administrative Templates > Windows Components > Windows Update.
To manage updates with Windows Update & notifications as described in this article, you should prepare with these steps, if you haven't already:
-Create Active Directory security groups that align with the deployment rings you use to phase deployment of updates.
-Allow access to the Windows Update service.
-Download and install ADMX templates appropriate to your Windows 10 version.
Walkthrough: Use Group Policy to configure Windows Update for Business https://learn.microsoft.com/en-us/windows/deployment/update/waas-wufb-group-policy
I hope this information helps. If you have any questions please let me know and I will be glad to help you out.
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