PBI Connecting to AWS Read Replicas (MYSQL, PostgreSQL, MS-SQL)

Thank You Anonymous , lbendlin 

1. This is my concern with AWS RDS Replicas and S3, I dont have an EC2 instance at my disposal. Are there no other options?

2. The S3, is it a case of getting the URL from AWS S3 buckets - but can i then query the S3 buckets like Athena does in Powerquery?

3. I dont have an integration storage level, meaning i only view data via dbeaver and pbi in their seperate schema. Thinking out loud, is there a way in Power/PBI  i can query accross RDS perhaps publish all the RDS Schema and tables to PBI service and i can then connect via DBeaver/tool to able service queries accross datasets?

Thank you so much, any help is much appreciated