Simplefin does allow you to connect to various brokerages like Robinhood or Public.com.
I haven’t looked at the data it supplies, but I would suspect its similar to other bank accounts. eg Account Name, Account Value, etc.
If position data is supplied great, but at very least being able to track the value would be nice. Monarch uses MX to connect to public I believe, which is also used by SimpleFin. Monarch does pull in positions, but not cost basis.
