Hi!
I’ve found a solution, quite easy and efficient but it’s not exactly what I’m looking for… It makes the vendor/brand’s link clickable but generates new urls (collections/vendor/designerA) instead of linking back to the brand’s original url/collection page… These new pages only show the brand’s product without any description… You can try it here : https://community.shopify.com/topic/1333245
Still looking forward to fix it. It’s native in some other Shopify Themes like Prestige (you can see it in the demo).