A little help with the shopping list?

This is my take on a visual shopping list UI. What I have so far is these images in the grid, each can be toggled on/off which in turns toggles an input boolean that triggers a node red automation which adds or marks “complete” the item on the HA shopping list. So far, so good.

The real headscratcher is how do I do the opposite - i.e. initiate action from the shopping list itself. I need to have the images in lovelace and input_booleans in NR toggled whenever I add or check an item on the list itself (via ariela while in the store for example).