Mongo DB Atlas vs Azure cosmos DB Mongo API

I would like to migrate my already existing Mongo DB to Azure Cosmos DB Mongo API, but could not figure out whether all the functionalities in use can be implemented in cosmos DB. Currently, I am using Mongo DB Atlas.Following are some of the functionalities that we are using in Mongo Db atlas.

1. Grid FS
2. Master DB for connecting all the other DB's.
3. Indexing manually.
4. Profiler.
5. TTL for documents( Data gets deleted after 90 days from its entry date).
6. Vertical Scaling, ie., more than 500 databases with at least 3 to 4 collections in each database.
7. Storing certificates whose size is more than 2 MB.
8. All the files are in JSON format.

Can anyone help me out with this?