...
At this moment in time, GA4 reporting is normally delayed by 24 hours, so there may not be much to see in the initial few days. You can also select reports to use Universal Analytics, while you build a GA4 data history.
...
Reporting Permissions
You should check the groups (and group members) which have access to reporting within Confluence because things have changed slightly regarding the need for a Google Analytics account.
Universal Analytics reports
To access Universal Analytics reports within Confluence, the user will still require their own Google Analytics user.
Google Analytics 4 reports
Any user in the permitted groups will
...
have access Google Analytics Reports within Confluence without the need for a Google Analytics account. This is a change from previous behaviour with Universal Analytics.
What else has changed?
We’ve revamped the reports substantially with several new features, such as tracking for search & anonymous users.
...