<p>Windows Server 2019 is little more than a rebranded Windows Server 2016 which is most likely why it’s not mentioned in the compatibility matrix you mention.</p>
<p>If you need to compare, Windows Server 2019 matches Windows 10 1809 (just like 2016 matches 1607) so you can take that for reference.</p>
<p>Feel free to edit the Microsoft documentation to add Windows Server 2019, if the edit is approved that’ll actually give you an “authoritative” answer from Microsoft.</p>