How to create a custom report in GA4

Click Explore on the left side of the Google Analytics 4 interface.

Select Blank or Free form exploration.

The interface in the Explorations is split into 3 main parts/columns:

Variables (it’s responsible for segments, dimensions, and metrics that you can use in the custom report)
Tab settings (it’s responsible for how data is used in the report)
The output (the report that you is generated based on your configuration)
Import necessary Dimensions and Metric in the Variable column.

Place the Dimensions (in Rows field) and Metrics (in Values field) you would like to visualize in Tab settings column.Your Report will be populated in the Output panel