Is it possible to still get unreal engine 5.0.0/If so how?

yeah i mean there are few large tutorials for 5.1, so I wondered if it was possible

Yes, both the 5.0.0 and the 5.1 version is accessible through the launcher:
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If you are trying to get the 5.0.0 and not the 5.0.3, you might have to get it through the Unreal Engine GitHub page.