The regen levels between models and between front and rear motor might vary by software version as well. To everybody saying that the AWD models only regen using the rear motor, I seemed to remember seeing someone post data showing otherwise. I went looking and found the info from around 2 years ago. That is why I commented earlier that the regen probably varies depending on many conditions that only Tesla knows. Anyway, here is the
data with nice
graphs showing the regen. This is just to show that, at least at one point in time, the AWD Model 3 did regen from both motors. That may not be true anymore. Also, relying on data from Scan My Tesla may not be the best source because its definitions become outdated with Tesla software updates and it could take some time for the developer to rediscover the new ones (so what used to be front motor torque might now be something else, or nothing).
Edit: Wugz on reddit collects a lot of data on his AWD Model 3 and occasionally posts a lot of info on what he's measured or observed. You can check this post and the one right below it for more info on what he's seen with regen (scroll down to
Regen/Power Limits and Power Bar Mapping and right below that his continued response).