[Plugin: All in One SEO Pack] One year and no SEO?

First, your language isn’t appropriate.
Second, I’m not sure what you asking for. Were you expecting the plugin to modify the content of your site?

Ohh, I’m sorry. How would you like me to react after using a product for a year which doesn’t seem to work? I’m not expecting it to modify any content but at least allow the keywords and SEO meta data that I religiously include on every post and page to actually become an attribute of the page and site so that it can be found.

I’ve now used over twelve independent meta data and keyword search functions to crawl the site and thus far not one instance of any of the data I included from the product has been found.

Can you please explain that?

If you’re referring to meta keywords, on which page are they not showing up?

I visited https://liquidmocean.com/ and https://liquidmocean.com/photography/photography-courses/ and both have your keywords in the source.

The plugin appears to be working.

I can see it’s in the source, I put it there with your product. I’m just a bit misunderstanding as to why it is not showing up in any real world seo searches I carry out?

Since it’s in the source code, the plugin is working.
I don’t know what “real world seo searches” means. What’s in your source code is real.

Your problem will be believing adding meta descriptions and meta keywords has an SEO ranking value.

Meta keywords has NO Google ranking value, waste of time using them Google completely ignores them.

Meta description has NO Google ranking value, but MIGHT be used by Google as your pages description for a SERP that MIGHT if the searcher finds your custom description compelling (ad like) result in a higher click through rate, but it won’t take a page from say 5th listing for a SERP to 4th listing (no ranking value).

You’ve also made the mistake in using the default settings for the plugin for your titles:

Post title | Name of site
Photographic Courses | liquidmocean

This is no better than what most themes generate out the box:

Name of site | Post title
liquidmocean | Photographic Courses

Best SEO title element is ussually:

Post title
Photographic Courses

Unless your site has a recognisable brand like Amazon.

David