Here the latest update about the missing heat pump.
I had a appointment with my dealer, they checked the two AC units and they found out that only the rear AC is equipped with a heat pump.
So the dealer called Fleetwood and they confirmed that the 2021 Southwind comes standard with dual heat pumps and they have no idea why my Southwind have only one
Long story short they ordered a new AC with heat pump and they will change the AC free of charge.
So if you have only one heat pump in your 2021 Southwind (maybe the bounder should have also 2) contact your dealer.