Test Mode in Google Merchant Center
Orders created in Google Merchant Center's test mode (Orders > Test mode) are NOT imported to Deliverr.
Connect to the Right Google Account
Make sure that you connect to the right Google account (the one that is an admin on your Google Merchant Center account) when you setup the direct integration. This may be different from the Google account that you use to log into Deliverr.
If you connect to the wrong account, simply go to sellerportal.deliverr.com/channels/edit/google and update your credentials to connect to the right account.
Check for Third Party Interference
Be sure to check to see if any other feed rules you have setup in Google Merchant Center. To do this, go to Products > Feeds > Primary Feeds and click through the primary feeds. Switch to 'Feed rules' in the tab on the top to see if you have any rules that may interfere with Deliverr's automatic updates.
Update Your Credentials if Necessary
If your credentials (the authorization that you give Google for Deliverr to access your Google Merchant Center account) go invalid, then simply go to https://sellerportal.deliverr.com/channels/edit/google and click 'Update Credentials' to reconnect.