sass - How to create a css (flex) layout where the layout wraps depending on the child items and not the parent?

Question

I would like to create the following layout: mockup

There can be multiple parent boxes that contain some child items. The container should flex wrap depending on the childs, not the parent.

question from:https://stackoverflow.com/questions/65847377/how-to-create-a-css-flex-layout-where-the-layout-wraps-depending-on-the-child

Answer 1

Waitting for answers