If your link event is actually triggering and the tag is not firing, I would check the mappings to ensure they are set up as follows:
The mapping should show as "tealium_event" --> global_navigation:global_navigation where the value after the colon is the name of the event in GA4 (the value before the colon is the variable's value that will trigger the event. In this case, when "tealium_event" equals "global_navigation", the GA4 "global_navigation" event will be sent to Google.
The event-specific parameters use the event name first, then the param name second:
"_ga4_param1" --> global_navigation.param1
In this case, the value of "_ga4_param1" will be sent to the parameter named "param1" with the "global_navigation" event. You'll want to make sure your param names align with the names configured in GA4 or Google won't know where to put the data.
If you need assistance beyond this information, I would suggest submitting a support request through our support portal.
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