Having been suggested to make a feedback thread on this, here I am. Thanks for reading!
The shop inside the Nomad is low footfall - most people do not even realise the shop exists, including at least one developer I've spoken to on the matter!
The appearances are different, as are the interactable spots - the pictures attached show this pretty well as my cursor is over both; one is one of the shops near the door, and the other is the Nomad's shop - I have a wooden sign (and some jars as of last night) to highlight the location as the shop doesn't highlight itself!
As some feedback, I'd like to suggest that the shop appearance be changed to something more obvious - this undersized display case is often ignored as it doesn't highlight at all! - or moved to this location to be more befitting of being obviously owned by the tavern itself: