I'm unsure if we are planning for a Multi-site or NSX-T Federation site approach. You should certainly refer https://communities.vmware.com/t5/VMware-NSX-Documents/NSX-T-3-1-Multi-Location-Design-Guide-Federat... to know more about this. Keeping that aside, in NSX-T we do have EVPN, but the use case is for MP-BGP ( control plane use MP-BGP) and data plan use VXLAN. However, if we are not using that approach, all workloads will be leveraging the Geneve overlay network and T1&T0 will advertise the routes to upstream routers but they don't advertise /32 unless we are doing NAT.  If you are looking for Site-specific Egress for your workload, watch out for NSX-T Federation. For influencing the ingress routes, you will have to some route manipulation.