Hi @david 
Here’s a video on how you can fetch data from Supabase using the REST API plugin.
Note that I tested my request in Postman on a table without RLS before moving into WeWeb because I wanted to make sure I found and understood the API request I was making without needing to worry about security policies and the WeWeb interface.
It’s something I generally find helpful because it helps me isolate where I’m going wrong.
Let me know if this helps!