Making power has nothing to do with how many power adders are used, nor how they are driven. Anyone can make a 800hp single turbo 5.0l coyote that will pass emissions though it will have non optimal drivability.
Drivability is the only reason to use twins vs a larger single turbo but again does nothing for peak power all else equal.
Sorry, not everyone can. Manufacturers have hurdles to overcome and a 5 liter with a single turbo or supercharger isn't gonna leap over what Dodge has done.