I've seen the ability in IPAM to never change a Transient IP address to Available for individual subnets. How is it possible to never put a subnet of IPs in a Transient status?
Transient doesn't count as "used" so it messes some things up with that count. Organizationally it isn't required for the system to place IPs in Transient status because the devices are configured a static IP address. It may be offline, but it's still a used manually assigned IP until it is manually changed to "Available" status.