Added some points to the "FAQ & Troubleshooting" section

- Added a note for when customers are seeing unmapped events being tracked to GA4
- Copied over two topics from the GA4 cloud-mode documentation that also applied to GA4 Web

Author: prigiattiperrut

src/connections/destinations/catalog/actions-google-analytics-4-web/index.md

@@ -48,3 +48,17 @@ With Google Analytics 4, you must create custom dimensions and metrics within th
 ### Debug Mode
 
 The Google Analytics 4 [debug mode](https://support.google.com/analytics/answer/7201382?hl=en){:target="_blank"} is supported with the Google Analytics 4 Web destination. DebugView displays the events and user properties that Analytics collects from a user in real-time. This can be helpful in troubleshooting your implementation.
+
+### Additional (unmapped) events being sent to GA4
+
+Google Analytics 4 automatically collects events triggered by basic interactions with your site. For more information, see [Google Analytics 4 Automatically collected events](https://support.google.com/analytics/answer/9234069?hl=en)
+
+### Data taking a long time to appear in Google's reports
+
+Google may take [24-48 hours](https://support.google.com/analytics/answer/9333790)  to process data sent to Google Analytics. As a result, the Google Analytics user interface may not reflect the most current data. The Google Analytics [Realtime report](https://support.google.com/analytics/answer/9271392){:target="_blank"} displays activity on your site as it happens.
+
+
+### Data not sending to Google
+
+Ensure that at least one mapping has been configured and enabled in the destination mappings for an event that you would like to reach Google. Without any mappings enabled to trigger on an event that has been ingested by the connected source, the destination will not send events downstream.
+