As @sdayman has said, you should always do page speed tests with tools such as GTMetrix, webpagetest.org etc using the canonical URL, because that’s what most of your visitors will hopefully click on when they find your site in search engines or social networks.
However, doing a
site:example.com search on Google I see that your site has pages indexed both with and without the www, which from a SEO standpoint is a no-no.
So you need to (1) decide whether you want your site to have naked domain or www version as canonical; and (2) implement a redirect to force all visitors (including Google crawlers) to your chosen canonical scheme.
For the second part, you can and should create a page rule on Cloudflare with a setting Forwarding URL, so that the canonical redirect is done by Cloudflare instead of by your origin server. For example:
In case you ran out of page rules and cannot afford to pay to enable extra ones, you should then set the redirect at the server level before it triggers WordPress. WordPress is what is causing the slow redirects as can be seen on the header
x-redirect-by: WordPress in the first screenshot you posted.
Instead, place the redirect in your .htaccess file (if you are on a shared hosting using Apache) or equivalent configuration file. The directive to redirect from naked to www (or vice versa) must be placed before the WordPress block, so that WP is not triggered for the purpose of this redirection. You can find examples of .htaccess canonical redirects by searching on Google.