This is an accepted solution.
Ash here from the Shopify team.
This is a great question, and I'm happy to help out! The Turbo theme is developed by Out of the Sandbox, so I took a look at the documentation they have for their themes here. It appears that Out of the Sandbox has their own product recommendation feature, but this was only supported up to version 4.2.0 of the Turbo theme. Not to worry though, because with more recent versions of Turbo, such as 5.0, you can use Shopify's product recommendation feature! Out of the Sandbox has created their own guide to using this feature with their themes here and specifically for the Turbo theme here. We also have some documentation on product recommendations in our Help Center here you can check out!
I hope this helps!