If it ships+digital 10mil in its first week you better believe Nintendo will have a PR on that like sun/moon
Pretty sure that number was a report from Famitsu not a Nintendo PR. Nintendo when issuing a PR so after a release it's pretty much how much a game Sold. But if you could find that Nintendo PR regarding 10M shipped, I would gladly be proven wrong =)
Recently you could look at both Mario Odyssey and Pokemon LG which both had PRs with sell through.