According to Shopify variant liquid object, there are subscription-related fields like requires_selling_plan, selling_plan_allocations, etc.
But I can't find these fields on my variants. I tried to add subscription plans to my products with Recharge or Awtomatic subscription apps. But these fields are still not found. How can I add these fields to my variants? And why are they missing? I can't find any information from the subscription docs.
After researching for a day, I found out that the payment gateway is the cause. When I was using Bogus gateway, these fields were not shown. After that, I switch to Shopify payment with test mode on, these fields appear.
I guess it's related to the Eligibility requirements
You can assign a subscription to a variant or not. You can therefore expect to find a mix of selling plan information per variant. It is up to you to check for the presence or absence of selling plans per variant.
