You can now set up Replication Agent for Microsoft SQL Server 15.7.1 SP200 on a shared disk, and add it as a generic application on the Windows Server Failover Clustering (WFSC) cluster.
In the WFSC cluster setup, Replication Agent for Microsoft SQL Server supports only the instance-level high availability cluster configuration for Microsoft SQL Server database. Replication Agent does not support the database-level high availability (an availability group) cluster configuration.
See Setting Up Replication Agent for Microsoft SQL Server on Windows Server Failover Clustering in the Replication Agent Primary Database Guide.