Explanation/Reference:
Peer-to-peer replication provides a scale-out and high-availability solution by maintaining copies of data across multiple server instances, also referred to as nodes. Built on the foundation of transactional replication, peer-to-peer replication propagates transactionally consistent changes in near real-time. This enables applications that require scale-out of read operations to distribute the reads from clients across multiple nodes. Because data is maintained across the nodes in near real-time, peer-to-peer replication provides data redundancy, which increases the availability of data.
Although peer-to-peer replication enables scaling out of read operations, write performance for the topology is like that for a single node.
References: https://docs.microsoft.com/en-us/sql/relational-databases/replication/transactional/peer-to- peer-transactional-replication