The first move is to confirm the label is even still true, by inspecting the live URL in Search Console’s URL Inspection Tool. The page-indexing report refreshes more slowly than the live inspection, so a URL listed as “Crawled, currently not indexed” in the report is often already indexed by the time you look. Checking the live URL before doing anything else saves you from fixing a problem that has already resolved itself.
If the live inspection confirms the page genuinely is not indexed, the one thing to inspect next is the page’s standalone value and whether it duplicates something else. The label is telling you something specific: Google crawled the page, looked at it, and made a deliberate decision not to index it. That is a quality and relevance verdict, not a technical access fault. The page was reached fine; it just did not clear the bar. So the question to ask is whether this page offers enough on its own, or whether it is thin, or so similar to another page on your site that Google sees no reason to index both.
This is also why the common reflexes are the wrong first move. Resubmitting the URL or touching robots.txt treats the status as if Google could not get to the page, but the word “crawled” already tells you it could. Requesting indexing on a page that was crawled and judged not worth indexing usually does nothing, because you have not changed the thing that got it excluded. Those steps come after you have addressed value, if at all.
So the order is: confirm it is real in the URL Inspection Tool, and if it is, inspect the page for thin content or duplication before anything else. Read the label as a verdict on the page, fix what earned the verdict, and only then think about asking Google to look again.