Car and Driver says it will be for a model called the Raptor R.
They also think the PowerBoost powertrain will be available on the Raptor along with the #3.5L EcoBoost.
www.caranddriver.com
They also think the PowerBoost powertrain will be available on the Raptor along with the #3.5L EcoBoost.

Listen to the 2022 Ford F-150 Raptor R's 700+-HP V-8
This supercharged V-8 engine will be saved for the even higher-performance Raptor R, which will arrive next year.