Picking :First Item from one list in to another list

I have 2 Data types “Restaurants” and “Restaurant Ambient images”. I want to display restaurants in a RG with each cell showing a unique restaurant and any or first or randomly picked image of that restaurant from “Restaurant Ambient images”

My RG
Data Type: Restaurent
Data Source: Search for Restaurants

Expression for the Image that I put inside RG Cell -
Parent Groups Restaurant’s Restaurant Ambient images’s : First Item’s Image

The above is not throwing any error but its not showing any data in preview

Essentially if there are 4 Restaurent Ambient images for each Restaurant but I just want to display one of those images in the Restaurent’s RG whats the best way to go about it?

I am not getting any errors but

Hard to say without screenshots. Could be a few things:

  1. are you sure there are Ambient Images populated for the restaurants?
  2. do you have privacy rules blocking access?
  3. is your image element setup correctly?

So essentially, in place of my RG displaying 4 images of a single restaurant I want it to display only one.

I can label one of those images as a thumbnail and filter it in “Search…” but I wanted to see if there is another solution using :First Item, unique item or group…

below are my data structure

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