Ok, you need to figure out why the peers are down.
Traffic needs to flow through both units in both directions. If either wanos is down, does traffic between pcs stop. Check the interface graphs whether traffic usage match on both ends.
lan0 and wan0 needs to be cabled correctly (Most often the problem with peers not coming online).
Check the logs, check the macs, swap the port roles.
Lastly set the encap udp on both ends.
Note: spinning this off into a "peer down thread"