Yes. In the Azure vMX you just define the AWS subnets in the "Local Networks" section (under Site to Site VPN) so they get advertised into AutoVPN.
https://documentation.meraki.com/MX/Site-to-site_VPN/Site-to-site_VPN_Settings#Local_networks
Azure will have to allow the routes, and whatever is providing the link between Azure and AWS will also have to support it. AWS will also need return routes.
The millions of firewall rules involved will also have to allow it.
If it was me, I would just buy a vMX for AWS. Otherwise it is way too much work and way too many things to look at when something breaks.