R1 and R2 have an LDP session but are not directly connected. What LDP session type is this?

A Targeted LDP session is established between two LDP peers that are not directly connected. This is typically used for scenarios like MPLS VPNs or when LDP needs to run over a non-LDP-aware network segment. The LDP messages are sent as unicast UDP packets to a specific remote LDP peer address. A Direct LDP session occurs between directly connected routers, using multicast Hellos on the shared link to discover neighbors. A Remote LDP session is not a standard LDP session type. A Tunneled LDP session is not a standard LDP session type; LDP itself can be tunneled over other protocols, but "tunneled LDP session" isn't a defined LDP session category.