Using LibreOffice writer 18.104.22.168 on ArchLinux. Looking like the page range selection (or single page) is gone. Under “Range and copies” there’s only “Number of copies” and “Collate”.
Solved, the translation for the current language was from the older libreoffice-package. Updating it restored the functionality.
I don’t have the left column, only number of copies.
Note that the problem is only in writer. In calc or impress it’s OK.