Just a warning: The current version has performance issues, it stutters like crazy even on beefy setups. It seems they didn’t get the level streaming implementation of UE5 right on the first try. This will probably get fixed for 1.0, but currently it’s painful playing in some parts of the map.
You are not allowed to distribute unreal source. From their FAQ:
Unreal Engine licensees are permitted to post engine code snippets (up to 30 lines) in a public forum, but only for the purpose of discussing the content of the snippet