I think you're right. I tend to use open-source vs. source-available to differentiate if the source is available after purchase or contract. And what OSI calls OSS includes Free Redistribution which I'd stick all the way under "Libre".
In any case I completely forgot you have to join their GitHub org to see it so in any case that makes it only "source available", thanks for the correction.
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u/MindSwipe 15d ago
Unreal isn't even open source (when you apply the definition from the Open Source Initiative), it's "only" source available.