Make sure your JS content is being rendered server side. There is plenty of research you can do on SEO for Single Page Apps and PWAs . If you built the web apps yourself, then you might have some fun reading up on Google’s and other external documentation on PWAs, SPAs, and prerendering (unless you’re using React which offers server side rendering natively and some useful SEO components).

If your goal is to have more visibility for peripheral topics, I’d agree that you should consider building out a blog/content section. Maybe consider hosting WP on a subdomain.

Congrats on launching the web app. Best of luck ??.