ACF : Flexible in Flexible with parent layouts (Wordpress)

Question

I’m using Acf by implementing fields trough Php. For a project I made my own page builder with a Flexible field. This field has 9 layouts (header video, content block etc….) My 10th layout is a tabs block with a repeater inside, till that everything is quite easy. the problem is I need to be able to add my 9 layouts in that field, a page builder inside a parent page builder.

How can I achieve without duplicating my parent layouts ? I can do this way but for each modification i will need to update parent and child layout copy.

Thank you the help.