I am just now getting some traffic to my site, but it is from pages that I have created and submitted the URL to Google Search Console. I've gone from practically no search engine presence to approximately 3,000 impressions a day in about a month. Again, all from manual submissions to the search console, but perhaps the sitemap has helped as well. However, most of the forum pages that I check through Google Search Console, they all show up as Discovered - Currently Not Indexed or just not found. I can submit them, but they are never indexed. I thought it was because the content may still be thin, but I can literally create a new page with thin content, submit that URL and it will be crawled within a day. Of the 170 or so pages that Google has indexed, I have manually created the vast majority of those.
I've read some other comments about how Google doesn't have unlimited resources so it doesn't index everything on a sitemap, or what is submitted and I get that. I think i've heard it called a site's crawl budget, but it only seems to impact the forum (calendar and gallery) pages created by Invision, not the pages I create manually. Just to be clear, my manual pages are pages that I write in PHP and add to the pages component of Invision. I submit those, and they are quickly indexed, whereas my forum topics have been submitted for days, weeks, months and are not indexed.
Is this due to Google deciding that they don't want to index my forum pages, but quickly indexing any manual page I submit, or is there something in the Invision software that prevents indexing until a certain point or length? Is there a setting or requirement that I'm missing to get these moved out of the Discovered list and onto indexed? I'd like to start driving traffic to the forum topics, but if my topics are never indexed - that seems like a big problem. What am I missing?