Re: One question.
Last time I had to deal with this issue, it was a pretty easy fix and, according to news reports I've seen elsewhere the same solution is available.
All the "licensed" software has long been packaged into a package called gapps.apk. Install that and you'll have ALL the Google apps you'd get on any other Android phone. Of course, finding a reliable place to sideload from might well be the biggest problem and that may just lead to a big black eye for the Orange One as people who want the Mate 30 get pwned by malware just because "The Chosen One" wants to beef with China.