Create a product list group by subcat

[yberges]

hello i need to create a product-list with a grouping via sub cat
my arbo

Cat 1
|_subcat
   |_ sub sub cat 1=> X products
   |_ sub sub cat 2=> X products

i need to display  subcat like this
sub sub cat title 1
product product product
product product product
product product product

sub sub cat title 2
product product product
product product product
product product product

ect

how i can achieve this ??

regards

Edited January 9, 2020 by yberges (see edit history)