I’d say this…most running backs of the caliber that Jeanty has displayed are sound football players and athletes in general. If you need him to be a good blocker, he either already is, or at worst, can easily be coached into it.
I wouldn’t worry too much about that aspect.
Think about it…how often do you hear of great, big time backs that struggle or have to come off the field due to blocking worries? Those types of guys just know how to play ball with just about whatever you throw at them that is needed from the position.