Firstly, I'm wondering if this is the best way to even do this.
I have a basic nav, one item has children.
The children need to be wrapped in a container div and each child needs to pull some ACF values from its associated page (image, ACF repeater values). The children are basically tiles with content + background images.
Is a walker class the best way to achieve this? The only thing I can manage to do is affect all nav items, I'm unsure of how to make it so that children items are affected and bring in the ACF values.