Campagnolo has sold MTB groupsets in the past.
They have also had long cage derailleurs off and on over time. The "Racing T" included a long cage rear derailleur and a triple front.
I presume those groupsets never had big sales, and they chose not to continue supporting them.
There is a lot of support for "spinning" and low gearing on road bikes today, but apparently Campagnolo hasn't followed that market for casual riders (road racing probably doesn't need the super low gears except for certain extraordinary circumstances).
Not seeing less than 34 in the front with current offerings, but an 11/32 in the rear with a few products.
https://www.cxmagazine.com/campagnol...rake-prototype
https://www.chainreactioncycles.com/.../rp-prod171270