We spend most of our day ( around 7hrs of it) learning Gemara, with all the meforshim, including Reb Boruch Ber, Shiurei R Shmuel, R Chaim and many more.
I don’t know how many years bochurim keep this schedule, but it’s certainly fewer than even in the rest of the chassidishe velt, and certainly the yeshiva velt. That’s not even considering the difference in the schedule itself.
When I asked a Lubavicher chossid whether the benches in his beis medrash/shul were occupied with people learning at night, his answer was, “that’s not our focus”.