Can't Get Inter-Subnet Routing Working with DMVPN Using Cisco Router

I'm trying to create a DMVPN configuration in AWS so I can extend my home lab into AWS for capacity.
For AWS networking I'm using one VPC.
I have a public subnet in the main route table for my cisco router's "outside" interface and an internet gateway attached.
That works beautifully, I'm able to pass traffic from my home router to the cisco router in AWS over the tunnel.
I have a private subnet in a second route table for the cisco router's "inside" interface.
I created a default route in the second route table pointed to the interface id of the cisco router's inside interface.
I spin up a RedHat VM in the private subnet.
I can ping the VM from the cisco router sourced from the inside interface, but I cannot ping the VM from the cisco router sourced from any other interface (outside interface or a loopback interface).

I'm a noob so I'm sure there's something basic I'm missing, any ideas?
Thanks!

Edited by: AJCruz on Nov 24, 2021 6:16 PM