Google will never stop checking your alternate URLs. Googlebot will periodically crawl them. Google Search Console will report any errors it finds with them. This is perfectly normal, and there is nothing you can do to prevent either of those things from happening.
Google will eventually index only one of those URLs. Even if Googlebot is crawling several versions of the URLs, it will find your redirects and index just the canonical version to which the redirects point. It may take Google months to get to that point. When I moved my site from HTTP to HTTPS, it took Google more than a year to index all the URLs as HTTPS. For some reason it was still indexing HTTP URLs months after they were redirected.
If you no longer want to see errors from your
www or HTTP URLs you can simply remove those properties from Google Search Console. When you have everything redirected properly, GSC is unlikely to tell you anything worthwhile on your non-canonical properties. The only reason I keep mine is for historical data.