I followed the steps (online sore/ preferences / Google Analytics/ Manage Pixel) to install GA4 by adding the Google plug in. I got the error storename. myshopify.com refused to connect.
I was able to make it work after removing the Google app from my store and re-adding it again.
Go to Settings → Apps and remove Google sales channel and go to Shopify app store and find Google sales channel app and add it back.
Thanks for the update. I did not reinstall. In my case, the app never got
installed. I just tried it again. It is working now. The change must have
been on the back end.
I’ve been running dual UA & GA4 for a while and tracking Google ads conversions with both. Now that I’ve installed the Google App, I have to remove UA code and a custom script from Loves Data. I’ll remove those over the next day or two.