Realm Environments?

How are MongoDB Atlas + Realm projects supposed to organize environments?

Are Realm environments supposed to all use the same database?

Are we expected to migrate entire Realm applications from project to project throughout a development cycle?

What’s the correct to organize MongoDB and Realm intro environments?

Why do I always have trouble finding documentation on this online?

Thanks for any help!

Double posting from old thread in other topic: How do I organize LOCAL-DEV, TEST, and PRODUCTION environments? - #3 by Tim_N_A