thats one common misconception of audis that they are all "FWD-based" .. yes weight is disproportionally over the front axel and lower end models use transverse engine design coupled with haldex awd, vast majority of cars have longitiunitally mounted engines and permanent rear biased AWD with optional mechanical torque vectoring (i have no idea why that is optional as audi banks so heavily on the Quattro branding)
easier to think VAG platforms that cars are based on... MQB based (Golf, A3) are transverse engine, haldex awd
MLB based (anything from A4 to Bentayga and Urus
) have longitiunitally mounted engines with torsen AWD . Although recently they have introduced quattro "ultra" which behaves more like a haldex system, i.e. rear axel typically disonnected
Then there's also a MSB platform (just panamera, continental gt, and flying spur sitting on it) that look similar to MLB but is Porsche designed (MLB is audi designed),
some internal VAG portfolio politics going on there