Like every other post about Google indexing in the last 2 months…
It takes time for Google to index things. Almost all of your articles are less than 2 months old, and from the looks of it, the Google index of your site is from… early June? I’d guess.
The things you see indexed are the things that were there when Google last indexed your site. When it indexes the site again, you’ll see more of them.
Assuming you have done all of the standard things covered in the other related threads already (and don’t need repeating in this thread again…), you’ll have to wait until Google reindexes the site.