Hello Don.
I’m assuming the EVN trunk is working and that you’ve checked the VRF configuration, and you’ve successfully verified that the vnet trunk has been created with the appropriate show and ping commands. I’m also assuming you’ve checked the output from the command show derived-confg and that the subinterfaces Gi3.10 and Gi3.20 are showing up. Check these first to see that the EVN is working correctly before any routing has been configured.
Looking through your config, I’m not able to find something that stands out as an error. It seems like it should work. Are you using GNS3, real devices or VIRL? Try doing a debug on OSPF to see that hello packets are being sent and see if any are being rejected on the other end or if they’re not actually reaching their destination.
I hope this at least gives you a fresh starting point for your troubleshooting. Keep us posted!
Laz