Hey Yani1!
If you app has read access to Products, it should be able to see a Variant’s metafields. Could you post some more info about the problem you are having? Info such as:
- Are you using the REST API or the GraphQL API?
- Could you paste the query you are performing here?
- Do you get an error when trying to access a variant’s metafields? If so, could you paste it here?