I am planning to install Office Online Server on Windows Server 2022 Server Core, Is it supported? if No which operating system is supported to install Office Online Server for SharePoint 2019?
As a short answer, NO, Office Online Server only supports the "Server with Desktop Experience" installation option of Windows Server 2016, Windows Server 2019 and Windows Server 2022, and you can't install Office Online Server on "Windows Server Core" because it's not supported!
Server with Desktop Experience
Windows Server Core
You can run Office Online Server on the following operating systems:
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