So according to this news
Avg number of passengers per trip for 20171 in
April are 1018 ~90.25% occupancy
In May 1256 ~111.34%
In June 1137 ~100.79%
Which...
more... is great for a train having total 1128 seats
If this train gets a speedup and 6 AM or after departure from RKMP then avg occupancy can increase further.