Did scopus choose not to add my paper (from an accepted journal) or did something go wrong? I have practically the same question as in here.

My most read/reference article is published in a Scopus indexed journal. The article is from 2016, and its indexed by Google Scholar.

However, when browsing the papers by that journal in Scopus, my article is just not there. Why would this happen? Is this a mistake, or genuinely someone/something in the system decided that my article does not meet some criteria?

If its a mistake, can I do something to fox it?

If its because my article does not pass some criteria, which criteria?
Something probably went wrong. It shouldn't take this long to index.

I would contact the journal / publisher and ask. It's possible your article "did not pass" some criteria, but those aren't fixable by you - the criteria is probably something like "we need your files in this format and the publisher did not provide it".