You need to define "Meraki SD-WAN".
If you are asking if a Cisco router can connect to a Meraki MX as a downstream layer 3 device, sure thing.
If you are asking if a Cisco router can participate in the Meraki AutoVPN mesh as an active hub, then no.
You can use various layer 2/3 switches and routers with Meraki equipment, but the AutoVPN feature is a "Meraki only" thing.