SRDF/A replication between power max

Hi, I'm new to Power Max, and I'm doing some research, but I haven't found any clear documentation on how to replicate Power Max via SRDF/A from a production site to a DRP site. These sites are located more than 300 km away, so I've researched that for these cases, it must be SRDF/A. Now, based on my storage knowledge, this replication should be done with an SFP+ or SFP28 connection from the production site, then through a WAN link and then to the DRP site via an L2/3 switch that has SFP+ or SFP28 ports available.

The first question is, is this approach correct?

On the other hand, I heard someone indicate that it was possible to do this replication via iSCSI, but from what I understand, this type of replication doesn't work well when using links that may have high latency.

Is this possible?

Thank you very much in advance for your prompt response.

Best regards!