The docs say you need to move one or both nodes to be farther apart:
> Two-node MetroCluster SDS is defined as a cluster for which nodes are physically separated (different rooms, different buildings, and different data centers) by more than 300m.
https://docs.netapp.com/us-en/ontap-select/concept_ha_config.html#two-node-ha-versus-two-node-stretched-ha-metrocluster-sds
You need to make sure it meets the requirements, especially network latency and such. Also, mediator service should probably be moved to a 3rd site because unlike when the HA nodes are in the same location, colocating mediator with one of the nodes could make cluster go offline during split brain situations.
https://docs.netapp.com/us-en/ontap-select/reference_plan_ots_mcc_sds.html