The customer configured a VRF and enabled BGP in it. However, BGP peer is not established as expected.
Upon checking BGP peers, there are no peers in the virtual router.
VRF configuration on customer's box does not contain a logical unit of lo0. BGP Peer came up after adding interface lo0.1 as per the document below.
https://www.juniper.net/documentation/us/en/software/junos/routing-policy/topics/concept/vpns-configuring-logical-units-on-the-loopback-interface-for-routing-instances-in-layer-3-vpns.html
Publish to close case.