https://wccftech.com/microsoft-removes-the-option-to-defer-windows-10-updates-for-business/

Microsoft has removed the option to defer Windows 10 updates through Windows Update with the release of its latest May 2020 Update, version 2004. The Windows maker offers its Enterprise and Education users the ability to defer new feature updates for up to 365 day. The company says it's making the latest change to avoid confusion.

Here is what Microsoft wrote in a support document for IT pros (emphasis is ours):