If your question is concerning only the ''international'' nature of the journal, then I think by checking the editorial board of the journal you can notice if the editors and reviewers are from institutions based in different countries and that makes the journal an international journal.
The SJR indicator of SCImago provides an alternative to the impact factor (IF) as provided by Clarivate and average citations per document in a 2-year period.
SCImago uses the Scopus database. Being included in Scopus (and consequently in SCImago) can be seen as one of the indicators that you are dealing with a genuine and legit journal. Especially when (in the case of an open access journal) there are additional inclusions as well (like membership DOAJ, PubMed, SCI(E) by Clarivate).
However be aware of the following:
Recently there are indications that so-called Hijacked journals ‘infiltrated’ in the SCImago information system and for example a home-page reference/links to the wrong (fake) version of the journal. See for example: