What are the step to provide a data Connection between two companies and display output on Quicksight for the receiving company

Company A wants to send Data to company B who uses Quick sight as a visual platform.

How can Company B get automated feeds (probably Redshift/ S3 ) from company A and connect same to Quick sight to avoid any manual tasks.

Hi, can you please explain how the AWS account setup looks like in your scenario? and how are the data sources distributed within your AWS setup?

We do not have a AWS account setup and still exploring options. Any Guidance would be appreciated.