My guess is that its an Atkinson cycle engine, and more than 48V (also published was the size of the battery 1.5kWh).
The electric motor is mounted between the gas engine and torque converter (from what I've read).
Also note that the new Lincoln Aviator also has a hybrid option with a plug (same platform) thus it has the same setup but with a larger battery.
https://www.lincoln.com/luxury-suvs/...r/2020/models/