Below is content that explains this clearly to prevent errors. Title: Does SharePoint Server 2019 Require a Separate Windows Server AppFabric Download?

SharePoint 2019 does not require a separate, manual download of Windows Server AppFabric. It uses the AppFabric 1.1 for Windows Server binaries, but they are included either in the SharePoint prerequisites installer or via the Distributed Cache service role. The standalone AppFabric download is typically only needed for older versions (SharePoint 2013).

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