Seven drops her tricorder but makes little effort to get it back. She admits to Chakotay that she has lost it but he doesn't care. Given all their talk about making a minimum impact on the local population, they don't even advise Voyager to locate it with the other shuttle parts to beam back to the ship when they leave.
When trying to find Seven while talking to the natives, Chakotay points to his right eyebrow trying to reference Seven's ocular implant. Seven has the implant over her left eye. It would have been more appropriate for Chakotay to point to his left eyebrow.