U have to test in incognito mode or when logged out of mautic, or mautic will ignore everything as it sees u as an admin and therefore not the intended target of the campaign.
I think you have found the breakpoint though. If the feed is not seeing the URL then the campaign won’t work as intended. That is likely linked to the incognito testing.
So step 1 - get Mautic to see the url hit, then move onto troubleshooting the campaign if still needed.