Unable to Filter Joined Reports Using URL Parameters

URL parameter filtering using parameters such as fv0= is not supported for Joined Reports because the Joined Report format uses multiple independent report blocks, each with separate filter contexts. The URL parameter filtering mechanism is designed for single-block Standard reports and cannot map parameters to individual blocks within a Joined Report. As a workaround, apply the required filters directly in the Joined Report's edit mode for each report block, or consider using a Standard Report with cross filters to achieve similar results