I would guide you to the Conceptual Framework of food systems for children and adolescents to find actors across food supply chains and food environments that play a role in the diets of children and adolescents.

Conceptual framework of food systems for children and adolescents - ScienceDirect

This is a really good question and unfortunately hasn't received much focus in the research or in development of interventions, that we have reviewed. ENN has recently conducted systematic literature reviews for adolescent nutrition interventions, and most we found focused on supplementation, fortification, meal provision or education for adolescents in schools - it feels like research how to impact the wider environment that shapes adolescents access to healthy food is largely overlooked. 

I think the conceptual framework mentioned above is really useful and does encourage engagement with the food industry - however, I think there is less known or researched about what actually should be done in this regard to positively influence adolescent nutrition.