On version 13 I could export a MusicXML file from Dorico and import to Cubase. I see that this import option appears to have been removed, therefore I can export to Dorico but not import. This is a pity as one of the main upgrades is to use Dorico technology. Or am I missing something?
Yes, the release notes for Cubase 14, which are intended to be read beforehand.
Still, there are some limitations you should be aware of:
MusicXML import is not supported yet, but it will be implemented in the future.