Resources are blocking the first visualization (first paint) of your page. Consider releasing essential JS / CSS sheets online and defer releasing all non-essential JS / style sheets. Various WordPress plugins can line up critical items or delay loading less important resources.
WordPress sites are infamous for spam which often results in bots and consuming resources without any benefit. You would never know that you have spam bots hitting your site unless you have verified using a tool like Wordfence and then blocking them (eg with Cloudflare).
Many database cleanup extensions do not optimize your database to the fullest extent. Occasionally, it can be extremely beneficial to manually go through the database and clean up the junk, especially the extension tables that were deleted.
Consider adding the `prefetch` or` dns-prefetch` resource indexes to make the first connections to important third-party origins.
There are a number of WordPress plugins that can speed up the display of your site by concatenating, minimizing, and compressing your styles. If possible, use a build process to achieve this upstream minimization.
Consider loading hidden or offscreen images after loading all critical resources to reduce the delay before interactivity.
Some plugins load across your entire WordPress site; even on pages and articles that don’t use the extensions. By selectively disabling them from loading on certain content, you can reduce the number of requests to your site and dramatically improve your WordPress speed.