This article provides information about the support extended by branch JRR (JunoS Route Reflector) devices for the Link Layer Discovery Protocol (LLDP). Support starts after JunOS Release 20.2R1
If you have configured the LLDP protocol for an interface on JRR branch device.
Peers for LLDP are able to ping each other.
But, you are not able to see the peer in the output of the show lldp neighbor command on JRR.
`show lldp neighbors` looks empty.
https://www.juniper.net/documentation/en_US/junos/information-products/topic-collections/release-notes/20.2/topic-151095.html#jd0e5688