One way is to display it with the specific peer ip.
Check Phase 1 Tunnel
ASA#show crypto isakmp sa detail | b [peer IP add]
Check Phase 2 Tunnel
ASA#show crypto ipsec sa peer [peer IP add]
Display the PSK
ASA#more system:running-config | b tunnel-group [peer IP add]
Display Uptime, etc.
ASA#sh vpn-sessiondb detail l2l | b [peer IP add]