Magento 2 redirects 301

Question

I getting this warning when I test in online seo tester.

Warning, no 301 redirects are in place to redirect traffic to your preferred domain. Pages that load successfully both with and without www. are treated as duplicate content!

Also like below.

Search engines see www.example.com and example.com as two different websites with the same content. This causes them to see a lot of duplicate content, which they don't like.

Right now your website is not directing traffic to www.example.com and example.com to the same URL. It is crucial that you fix this.

Use the rel="canonical" tag to tell search engines which is the definitive version of your domain. Use a 301 redirect to divert traffic from your secondary domain.

This issue can be caused by problems with a website's SSL configuration. Check your site's SSL configuration for any errors.

If you need help resolving issues with your SSL configuration, consider using a professional service to set it up for you.

How could I redirect www to https. Also dynamic canonical tags. Please suggest!!