Google Analytics 4 users report data gaps in reports
Google denied data was missing from the User Acquisition and Traffic Acquisition reports in Google Analytics 4.
Users claimed that data prior to September 6 is no longer available, despite it having been in place for at least two years prior, as demonstrated in the screenshot below:

The screenshot was shared in the Google Analytics Help Center.
In response, 15 others confirmed they were experiencing the same issue:

What Google is saying. A Google spokesperson told Search Engine Land:
- “Data prior to September 6 was available by changing the primary dimension to Default Channel Group (this is noted in our Help Center).”
- “Additionally, to avoid any confusion, we’ve now released an update so that customers can access this data in the Primary Channel Group without making any changes.”
Why we care. If you are still experiencing this problem, changing the primary dimension to Default Channel Group should resolve it.
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Deep dive. Read the full thread on the Google Analytics Help Center for more information.
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Contributing authors are chosen for their expertise and work under the oversight of the editorial staff. Search Engine Land is owned by Semrush. The contributor was not asked to mention Semrush; the opinions expressed are their own.