Nah, Stellantis is just bad. Their EV tech is poor. They have no dedicated EV platform, and they struggle to make profit on EVs. They're not invested in CCS at all — they're still hoping EVs are a fad.
Stellantis has dedicated EVs in Europe. That largely why Stellantis was created in the first place. So FCA would not be totally lost on EVs. The PSA group does have EVs.
But you are correct, they are not much invested in CCS in the US. Unlike say Volkswagen.
By lack of a dedicated platform I mean that all of their EVs share the platform with ICE/hybrid versions of vehicles. They're either available with an engine of your choice (like Peugeot and DS), or are only a new body on an older ICE+EV shared platform (like Jeep Avenger is built on Opel/Vauxhall Astra).
Contrast this with VW MEB, Hyundai/Kia eGMP, Porsche J1, Mercedes EVA, etc. that were all ground-up EV skateboards without ICE support.
But you are correct, they are not much invested in CCS in the US. Unlike say Volkswagen.