I am trying to create an audience based on exit and entry events i create in GA4.

We are finalizing our migration to Google Analytics 4. Our current client base has a bunch of accounts that are using Universal Analytics tags. Do I need to go through and remove those/replace all with their new GA4 tags?

I am sending the following events to Google Analytics 4:

I’m looking to build some custom reports in GA4, to monitor the onboarding process, but as Im a fairly new user to GA, and just learning now with guides etc, I seem to run into a dead end now. What I want to do is to understand at what stages users churn from the process, by tracking the number of them at each of the steps.

I am trying to collect user ID’s for google analytics tracking, but am confused on discrepancy between articles I found.