You've started setting up Google Analytics 4 (GA4) and you've managed to set up conversion tracking. Now you just need to know where you can view the conversion breakdown in GA4 for each of your marketing campaigns you set up UTM parameters for.
Fortunately, it's not difficult to find. Simply go to the "Acquisition > Traffic Acquisition Report", just make sure not to forget the dropdown menu to select "Session Campaign":
Then if you scroll over to the right you should be able to see the conversion breakdown per UTM Campaign. If your site has yet to generate any clicks or conversions you may need to wait until then before you can see the conversion data in this report.
It takes roughly 24 hours before new events show up in GA4, after which you can mark them as a 'Conversion':