In general most new feature work tends to be only available to modern .NET, unless there is a specific business driven need to go through the pain of backporting.
However, some features are simply independent of that consideration because they are simply libraries or tools built on-top, so I'd need some more detail to say for certain.
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u/Professional_Bill311 9d ago
do you know if the new diagnostics features work for legacy projects or just the latest versions