From reading it, I'm not really sure if it's eventually consistent or not.

Replicas then update cache pages in the shared buffers. This ensures eventual consistency for read replicas within the same region as your database.

Data Consistency: Reading data from a single source ensures data consistency. This addresses a common challenge in traditional read replicas where there might be a replication lag.

Resource Customization: Neon allows you to allocate different CPU and memory resources for each replica.

So there is a single source of data, but can have different CPU and memory and has eventual consistency in the same region?