Add Global rating collection page

New Member
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Good morning all,

I would like to add an overall rating to my collections pages. An average of all products therefore. History to increase the click-through rate (source semrush).
Even though I have searched for 3 weeks, I have not found a single answer on the French and American forums. I use Loox - Photo reviews.
I imagine that it is the structured data that must be manipulated. I run this thread if by magic someone has an answer.
Thank you