Here are possible reasons and fixes for why Google Shopping fast tags that are not showing up.
Add products via a Primary feed
Verify that the Deliverr supplemental feed is correctly linked
The Deliverr supplemental feed must be "Used In" the primary feed containing all of your products. If not linked correctly, no fast tags will appear. To verify that the supplemental feed is correctly linked, navigate to the Products > Feeds page in the Google Merchant Center. Check that the value of "Used In" for the Deliverr supplemental feed is the primary feed with your product catalog. If the "Used In" value is "None" or the incorrect primary feed, the supplemental feed is incorrectly linked.
Here's the fix:
1. Follow this help center article to create a new supplemental feed that is "Used In" the primary feed of choice. Optional: feel free to delete the old "Deliverr" supplemental feed.
Wait for Google to process fast tag locations
It can take up to several days for Google to propagate fast tags to search. If just recently signed up, please wait a couple days for the first fast tags to show up.
Limitation of Shipping Services
Google limits the number of shipping services to 20. Deliverr uses these shipping services to manage fast tag coverage. Each shipping service represents sets of 1-day, 2-day, and 3-day zip codes with fast shipping. We need to create multiple shipping services if your products are in different warehouses and thus have different coverage.
For large product catalogs, we can't create a shipping service for every product. For products without a dedicated shipping service, we try to assign an existing shipping service with similar coverage. If none is found, we don't assign any shipping service and thus the product will not have fast tags.
No action is need.