I sent them everything in the initial application : proof of passive income, bank statements, tax returns 2023 and 2024. Every file had a front page explaining what was in the file, i made everything as simple as possible.
I don't think it could have been approved after only two days. But as everything was there and simple to understand, the screener may have thought i would be approved and asked for health insurance to have a complete application package to give to his manager.
The insurance start date was the day i sent it, as i did not know the processing time.