+Informed the customer that:
All the mentioned ISE VMs are getting uploaded to the SNTC portal. They will be visible under all hosts because these are the virtual machines.
ISEv will show as a host in SNTC and since we would collect the version, it would enable the SW-based Alerts in SNTC, such as SW EOL, SW Field Notice, and Security Advisory.
These 2 are the Chassis with the product id SNS-3515-K9 which you are seeing under All Equipment
And the rest mentioned ISE VMs will be visible under All Hosts in the SNTC portal.
Path to see these devices-
Go to All Hosts >> Then search ISE VMs under Hostname.
>Issue has been resolved now.