How do I get the entity ID from a view row and pass it along to the item list template?

I have a view which returns rows of entities. Each entity has several multi-value fields.

The structure is kinda like this:

• Field 1:

  • Item A
  • Item B
  • Item C
  • ...
  • Item H

• Field 2:

  • Item A
  • Item B
  • Item C

Field 2 holds values that are related to Field 1 Item B. When displaying Field 1 in the view results I'd like to be able to display them like:

Field 1: Item A, Item B (Field 2 Item A, Field 2 Item B), Item C, Item D

Because its a multi value field Views is using the item_list template. My plan was that I would adds some conditionals to this template so that if Field 1 Item B was to be shown, I would use Twig Tweak to add the values from Field 2 inline to it. The only problem is that to do that I need the row's entity ID. For the life of me, I can't figure out how to pass this information into the item_list template. This template seems completely removed from the view and doesn't have a way to reference it.

I've been trying various functions in my theme file to get the result row NID and pass it along as a variable into the list_item template, but have had nothing but failure. I've figured out how to get a custom variable into the item_list template preprocess_item_list, but I can't figure out how to get the row NID into this function.

Any help would be appreciated.

Add the node id as a hidden field to the view, then inside the templates {% for item in items %} you should be able to reference it as item.content['#node'].0.nid|raw but you may need to kint item.content to find out the actual value.