Data is collected by Web SDK just like how you send data to AA or AEP, Event Forwarding is one of the service options in Datastream (Server Side / Edge Network) for you to send data to 3rd party destinations. But I believe you still need to create an Event Forwarding property in Launch to specify wh...

Since you are using AA now, the following link are good articles for your question. Customer Journey Analytics overview | Adobe Customer Journey Analytics Customer Journey Analytics feature support | Adobe Customer Journey Analytics 

kdnctr identity stores an encoded copy of the ECID. see below for details, https://experienceleague.adobe.com/docs/experience-platform/edge/identity/overview.html?lang=en  

For web browers, it's when the Web SDK library cannot find the AMCV and kndctr identity cookie. 

Hi, Checking on how Web SDK handles the existing AMCV cookie, found that the expiry date of the kndctr identity cookie seems does not refresh when clicking several pages. While can see the kndctr cluster cookie expiry refreshes on every hit. My understanding is that this cookie carries the ECID, if ...

see if this helps, Solved: AEP Batch Ingestion Error | Updates are not suppor... - Adobe Experience League Community - 590921 

have you also checked the data set activity page to see if data are ingested successfully or any failed batches.

Yes, see below screen capture for reference. Web SDK data to AEP data lake is sent in micro batches, so maybe there will be some delay.  

Hi, Question on CJA geographic dimensions. Data is streaming into data set with Web SDK, with Geo Location set as "City" in Datastream. It seems like only the Country dimension is populated with country data in CJA workspace, while there is no data in Regions or Cities dimensions, is there settings ...

Hi, Just searched the previous posts and it seems sending data to AEP profile with Web SDK is not currently supported. Is there any update on its roadmap? Solved: Adobe Web SDK - Data Collection - To Profile Schem... - Adobe Experience League Community - 453662 We need this to support the use case o...