There are many reasons why some of your Fera Reviews aren't syncing to Google Shopping. Let's go through them together.
Reviews don't contain any kind of content - Your store or product reviews must contain title or description in order for them to sync into Google Shopping.
Reviews aren't approved from your dashboard - Reviews that are currently in a "pending approval" state won't be synced.
Reviews aren't verified (or imported from a verified source) - Only reviews that are verified will be eligible for synchronization.
Reviews aren't about a published product - Your reviews must be attached to really products. You can check that in the new "Products" section.
⚠️ Note: If you're still experiencing some issues with the Google Shopping integration, then you should feel free to contact our support.