Professional, Education and Enterprise editions – up until v1909 – were allowed to modify when Windows can check for these Feature Updates. You were able to defer the update by a year. [Especially good since some recent Feature Updates have had issues.]

As of v2004 [“May 2020 Update”], this has changed. You can only change the way Feature Updates are checked by using the Group Policy Editor or the registry.

To modify, open the Group Policy Editor and follow the path Computer Configuration > Administrative Templates > Windows Components > Windows Update > Windows Update for Business > Feature Updates are received.

• Select Disable to disable checking.
• Select Enable and then enter in the version number found in the Version column at https://aka.ms/ReleaseInformationPage

By registry to disable:

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate]
“TargetReleaseVersion”=dword:00000000

By registry to enable:

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate]
“TargetReleaseVersion”=dword:00000001
“TargetReleaseVersionInfo”=”2004”

Replace 2004 by the appropriate version that you want to scan for [obviously greater than the version you currently are using].

Source: https://ebraiter.wordpress.com/2020/06/24/changed-to-feature-updates-in-windows-10-v2004/