Scopus is owned by Elsevier B.V. and Elsevier is solely responsible for the content selection policy of Scopus.
We have applied for all our journal titles already in 2015. A list of approved titles is in the article Which JMIR journals are indexed in Scopus?.
If a JMIR journal has been accepted for Scopus, but you cannot find your article, please file a "missing document" user support request with Elsevier. As Scopus is an Elsevier product, we are not responsible for and are not auditing their coverage. For details on how to file a missing document request see Which JMIR journals are indexed in Scopus?.
If a JMIR journal is not in Scopus but authors require coverage for tenure & promotion (fortunately that is rare), please refer your Tenure & Promotion Committee to the fact that Elsevier is deliberately delaying indexing of open access journals with multi-year turnaround times on requests to index our journals (see Which JMIR journals are indexed in Scopus?). Some of them are in evaluation for 7 years or more.
Authors/users are also encouraged to fill in their Journal title suggestion form for missing JMIR titles:
The more people complain about the omission of certain JMIR journals from Scopus, the more likely it may be that Elsevier takes action and reviews its' policies on delaying the evaluation of OA journals.
Having said that, in our experience, a listing in Scopus is neither critical nor very important (given that all our titles are in PubMed), but we would still suggest to fill in their form (preview below).