As written on the public Realm roadmap:

> There are specific Realm Cloud features that will not be integrated into MongoDB Realm during the public beta phase:
>
> Query-based Sync: MongoDB Realm will require this feature to be re-architected to maximize scalability and performance. MongoDB Realm will initially focus on full sync and within the GA phase we expect to re-architect query-based sync to be fully optimized for MongoDB Realm.

To limit confusion until query-based sync gets re-architected in the second half of 2020, we'll remove any call-to-actions related to this feature.