Nothing prevents you from adding multiple charts to the same report.
Just 1) create empty bands in the report structure for each chart; 2) create named regions in the template file with the same names as these empty bands, the named regions should not intersect; 3) create charts within these named regions.
Here’s the simplest example based on our classical sample-library app: Book availability in department.zip (25.3 KB)
The charts position in the template should correspond to the bands orientation.