List of parent and child taxonomies and related content
There is more than one way of solving this.
If you start from your existing case of Content Views and listing your Products, you can add the Taxonomy ER Field. This field will show the Term that the node is directly linked to, the &quot;child&quot; in your Taxonomy hierarchy.
To get the &quot;parent&quot; Taxonomy term you have to add the Relationship for the ER field in question. Once you add that you will be able to access the Parent Field from the &quot;Taxonomy term&quot; Category.
You can then set Grouping under Format Settings. Set the first grouping to the &quot;Parent&quot; Field, and the second one to the &quot;child&quot; regular taxonomy field.
You can hide the taxonomy fields with Exclude from display since they'll appear in the grouping output.
Alternatively, you can add a second Relationship on top of the first one, for the Parent of the term, but that approach isn't necessary unless you have 3 levels of taxonomy hierarchy, and it can add to the performance strain.

You can also start from the Taxonomy term type Views, show hierachy with Depth, and use a Relationship to add the nodes/content into the View.