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You seem to be facing differences in data between the Google Analytics Data API and the Web UI. This discrepancy could be due to a few reasons, one of them being Google’s data sampling which can apply when querying data through the API. When you switched to the GA Reporting API, you encountered issues because it requires a View ID and you’re using GA4, which only supports Property ID. Also, using a third-party tool like Looker did not seem to resolve the mismatch. It’s important to understand that fetching real-time data through the API could have certain limitations and may not always perfectly align with the Web UI data. You might want to consider seeking direct advice from Google’s support or possibly re-checking the exact metrics and dimensions you are querying in the API. This could ensure that the queried data matches as closely as possible with your Web UI.
