If https://www.defensetech.org/2013/09/27/ohio-class-subs-to-sh... is correct, then at least the Ohio class submarine drives the motor directly off the turbines, but the thing being designed to replace it will use electric motors. And actually, https://en.wikipedia.org/wiki/Columbia-class_submarine#Elect... talks about the same, but with some comments about the few submarine types that do this so far. And following the link to https://en.wikipedia.org/wiki/Integrated_electric_propulsion gives us https://en.wikipedia.org/wiki/Integrated_electric_propulsion...

Looks like some of the most modern or in-design classes are using electric drive, but most things out there are using direct mechanical linkage to the turbines to drive the propeller.