Office 2019 is only available in click-to-run versions, no longer in MSI version.
officedeploymenttool_12827-20268.exe /extract:.
setup.exe /configure yourxmlfile.xml
The website offers limited choices for Office (sub)programs.
To create an XML for only Outlook 2019:
<Product ID="Standard2019Volume"
<Product ID="Outlook2019Volume"
See List of Product IDs which are supported by the Office Deployment Tool for Click-to-Run for the other Product IDs.