Verify that the BGP neighbor relationship is established and then check whether the routing table is populated.
Log in to the Leaf2 node and run the show command, show ip bgp summary, and observe that the neighbor entries are populated and message counters are nonzero. This shows that BGP is operational. You will see interface names instead of IP addresses of the neighbor endpoints since we are using Unnumbered BGP.
Other commands to run are Show ip bgp l2vpn evpn and Show ip route.