1
Install GA4 Add-on
Extensions → Add-ons → Get add-ons → "Google Analytics"
2
Configure reports
Create Tab1Data and Tab2Data sheets. Add date dimension. Set 90-day range, 2000+ row limit.
Tab1: sessionDefaultChannelGroup · pagePath · date · sessions
3
Publish each tab
File → Share → Publish to web → select Tab1Data → CSV → Publish. Repeat for Tab2Data.
4
Paste URLs above
Paste Tab1Data URL in field 1, Tab2Data URL in field 2, click Connect.