Lost Backpack with iPad and Notebooks on NS Intercity from Delft to Amsterdam

Good evening all,

My partner left her backpack behind on the NS train today from Delft to Amsterdam. She got down at Leiden which was her stop but forgot to pick her bag up. She immediately notified the NS counter at the station about it and she was informed that two conductors made a round of the train but couldn't find the black backpack. The iPad is quite old but is very sentimental since it has all the photos from our time together backed up on there as well as her personal journal. She tried using Find my Device but it gives her the old location when she used it a few days back in Leiden and is now probably with a flat battery. On the small chance that someone does find this backpack, please drop it off to the Lost and Found counter of any NS location Is there anything else I can do to help her locate her belongings?