In general, some clients will have issues with introspection queries (which they use to show the list of available schemas). And even when introspection works, we can't show you all 40k datasets or it might break your client. So we just show "featured" datasets, and for a more exhaustive list you can go to the website to find a dataset.
But, you can still query any dataset on Splitgraph regardless of what shows in your client's schema list. You can go to https://www.splitgraph.com/explore to find datasets, and from each dataset's repo page, you can click "tables" or "query SQL" to get a sample SQL query to run.
Congrats on the product BTW. Very promising!
I've been looking forward to something like this for years.
Could you try again when you have the chance?