I train others in the scoop draw in the threat focused courses. Yes, you can use this method with a closed front or open front garment. I've demo'd it in courses with both on [ t shirt untucked under an open front jacket ]. The clearing method I use and extend to others uses only the shooting hand. It's doable, students don't have much of any problem performing it once shown.
Students use that draw with an fbi canted holster at 4:30 very proficiently [ or it's counter position if left handed ]. Actually a bit surprised when I saw the thread title.