No ****. But does Dragon has factory for producing this engines, that's what I meant if you haven't noticed.
I'll be honest, the lines are little blurred athrough the field and it's not quite as simple as 'who builds the engines?'.
Also depends on which aspect of the powertrain you're on about exactly. The cooling system is a hugely important part of the powertrain design and that can be fairly easily be designed and manufatured in house by all the teams, whereas motor design is more likely to be outsoured to a technical partner if it's a smaller outfit. There's inverters, transmission and software too, making up the overall powertrain pakage entered for homologation.
And then there's Jaguar, who say they made every major omponent in house and claim to be the first FE team to do so.