Flaw in CC and XD which doesn’t allow access to open Synced files in XD

CC and XD do not allow opening of XD files from Synce files.

I hate Cloud Docs because if there is no internet I cannot work. Therefore I only ever use Synced files so i can work offline on local PC, then sync & share with colleagues or customers online. But XD is stupid: it doesn’t allow access to Synced files on iOS! Come Adobe! Get it right!