Hello, what is the best way to have product upsells on Replo?

Hello, what is the best way to have product upsells on Replo, do I need to integrate a shopify app or can this be done on Replo itself?

Hey we do have an integration with Rebuy. You could try to create manual upsells using Popups.

You may also be able to do this by integrating other apps through custom liquid.