iCloud Drive "online only" feature on Mac

Hi! I used Dropbox drive for a long time, now I changed to iCloud Drive (2TB). I really missing this "online only" feature in iCloud Drive, that was a really cool thing in Dropbox. Now I can't free up store manually, just automatically doing it my Mac. So I would like to request for this feature in iCloud Drive too. As long as this feature is not available, is there a way to delete the heavy files from the Mac's drive? I tried CleanMyMac example, I hoped it will delete the Files as "junks", but not. Any way to delete it from storage but not in cloud too?

Thanks a lot!

Adam

(sorry for my English)