In Google Universal Analytics I used to create segments of users who triggered a custom event. After creating them I could use these in comparisons on dashboards but also in custom Data Studio (Looker Studio) reports.
I'm looking for a way to do this in Google Analytics 4.
So far I've tried these things:
Setup audiences, this works except it isn't retroactive and there's a limit of 20 audiences. I need more because I have at least 20 custom events with a couple of different custom events with custom dimensions.
Use explorations. First explorations look bad in contrast to what you can do in Data Studio. Also when I create a Funnel exploration with a step in which I choose a custom event and set the parameter filter to: custom dimension x contains y. It updates the summary to 0 users, but I am sure there are users who match this criteria. When I don't add the parameter filter it does work (though it doesn't show what I want) but it sets the sample rate to 11%. So the data is not at all reliable.
Use promotion. I tried using promotions via promotion_view and promotions_select, but the promotions are missing a conversion rate. This is because you need to send the promotion id with the purchase event. But this means other promotions, like internal banners are overwritten, that's also not what I want.
Is there anyone who can help me figure out how I can get the ecommerce conversion rate for users that triggered a custom event? Thanks!
