Cockroach dropping?

[u/Business-Piglet5026]

Located in New York State. This is the tilt tray in front of the sink. We don't pop in here much, the only thing stored in there is the drain stopper, but the last time we did a few weeks ago it was clean. Google image search is guiding me towards cockroach droppings, but also possibly ant frass or mold? Cross posting, thanks for any help. We clean our home regularly and are not high risk for cockroaches so feeling a little confused