The dnd 5e hand drum item was sometimes called hand-drum, it was the percussion musical instrument. It can be available at Faerun.
Description Of DnD 5E Hand Drum Item
The hand drums were consisted of the double-headed drums by a shoulder strap along all of their sides. Al though they were used by the bards either like rhythmic instruments to accompany ensembles or even by themselves like the alarms to alert of the danger or else to mark the narrative campfire tales.
However they were available for purchasing via Aurora’s Whole Realms Catalogue.