How loop taxonomies category and their childs efficiently

You need 2 query loop, nested.

First query

Set “parent” to 0.
Enable “Current post terms”

You will get only top level terms:

  • Bathroom
  • Bedroom and laundry

Second query

Nest this query in the first one.
Set “parent” to “{term_id}”.
Enable “Current post terms”

Take a look at

https://forum.bricksbuilder.io/t/how-do-i-select-parent-or-child-when-using-terms-query-loop/