Is there a place I can download previous version of KDE Neon?
On the download page only the latest version is available which of course is the choice 99% of the people need.
I just need older version of test stuff out but cannot find any older downloads.

Did you figure out where to download older versions? The latest version doesn't work for me, and comments I've read say it's a bug and older version work.

I've got older versions from here:
https://linuxdistros.org/genres/KDE-neon

Try torrent
Everything that I just can't find on Internet resources, I start searching on the torrent using rarbg. Recently I found the documentation I needed that I couldn't find ANYWHERE ELSE. So I advise you to try this option, I hope it will help