I think room exists for Mopar forums that haven't been taken over by VerticalScope. But I don't think that the Stellantis name is catching on. Had you kept it Mopower, maybe it would have drawn more interest. My guess is that most of your audience is interested in Chrysler, Dodge, Ram & Jeep products (plus the Plymouth, De Soto and Imperial orphans), and doesn't care about the European brands.
Will this link be directed straight to your Motales forum?