more than one pbix

Hello, I am dealing with App Onws Data, from what I am seeing, the report that it reflects comes from a specific pbix, but is there the possibility of telling it to take more than one pbix?
In the web.config file there is the following:

<configuration>
<configSections>
<section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
</configSections>

<appSettings>
<add key="webpages:Version" value="3.0.0.0" />
<add key="webpages:Enabled" value="false" />
<add key="ClientValidationEnabled" value="true" />
<add key="UnobtrusiveJavaScriptEnabled" value="true" />
<add key="authenticationType" value="ServicePrincipal" />

<add key="applicationId" value="" />
<add key="workspaceId" value="" />
<add key="reportId" value="" /
</appSettings>

Thanks