I don't own a pistol carbine, but I do own a gun that fills the same niche: a Taipan Veteran Short. (OAL of 24 inches if left in OEM form). And, having owned that gun since around 2018 and it being my most widely utilized, I completely understand the allure of a short and compact airgun of modest power level and exceptional accuracy.
OP also mentioned compact scopes going on these compact guns. I tend to go the other way, opting for more glass. My little Vet has a 6-24x50 scope on it and I have no plans to change that. This allows me to get more use out of the gun than only pesting and plinking, and that specific use for the greater magnification/bigger scope is field target.
Many guys are trying to turn airguns into firearms on the other spectrum, but lots to love in a <20fpe short little sub 30inch gun. Compact and low power is where I personally find the most airgun joy.