Hello!
Here is what happens when a URL is checked:
- If the issue is not found, the instance validation state changes to Passing. If this is the first instance checked after validation has started, the issue validation state changes to Looking good.
- If the URL is no longer reachable, the instance validation state changes to Other (which is not an error state).
- If the instance is still present, issue state changes to Failed and validation ends. If this is a new page discovered by normal crawling, it is considered another instance of this existing issue.
If none of these are being displayed, you want to first identify if their are any errors (Uses Incompatible plugins, Viewport not set, text to small, clickable elements to close etc )
After you fix all instances of a specific issue on your site, you can ask Google to validate your changes. If all known instances are gone, the issue is marked as fixed in the status table and dropped to the bottom of the table
If there are no errors and the page still has not been crawled for mobile usability, then simply ping google to re crawl the site. I would realistically wait 1 week as I have seen a delay in search console and waiting for results to be displayed.
Hope this helps. If you have any other questions reach out!