Advice on Migrating from Firebase to AWS services

I'm currently using Firebase as the backend for our company's flutter application prototypes, but lately we've had issues with what tools are available to us using a very simple noSQL database like firestore. I'm wondering if anyone can point me toward the aws service (if it exists) that is closest in simplicity and function to firebase; but will allow us to set up a relational database and an api to access it from; and beyond this, maybe even hosting and authentication.

If there is no one product that bundles these services together, what are all the pieces needed to achieve setting up a fully functioning back end using aws? Any advice would be extremely appreciated!