I had the same symptoms, except that show managers did show a pending registration. I followed the instructions from TAC and reimaged the device from the following article:cisco.com/c/en/us/td/docs/security/firepower/quick_start/reimage/asa-ftd-reima...

I had this too, conditions pretty much matched CSCvt08514(https://quickview.cloudapps.cisco.com/quickview/bug/CSCvt08514) My device was ISA-3000 on code 7.0.1. Also, I wasn't able to start FDM to manage the device locally, so what I did was an upgrad...

** EDIT ** sorry, I missed that you wanted to add the info to the dashboard, I agree it's missing You can go to devices -> Site to Site MonitoringThis doesn't work for policy based VPN, though. You can check ipsec sa status by clicking the small eye...