Solarwinds provides the network insight feature and tunnel, vpn monitoring for limited vendors. In large customer infra, the Firewalls are available with different vendors so the question always comes back when we are able to provide tunnel monitoring/network insight in case of Palo Alto, but not for other vendors.
Thus this feature should be extended for other vendors as well, especially firepower (as this is from Cisco and Solarwinds provides good support for Cisco) and Checkpoint which is one of the faster growing firewall technology.