Hi @ArunRaaman ,
SQL Server Reporting Services are no longer part of the installation media since SQL Server 2017. They are delivered as a separate Installer. The new Installation Wizard gives no option to install multiple instances of SSRS 2017 on the same machine. Only one instance of SSRS can be installed on a server. This is very briefly confirmed, in Microsoft’s documentation on working with multiple instances.
We'd suggest that you may install another SSRS instance in another machine.
For more information,please refer to: Installing Multiple SSRS Instances on a Server is a Thing of the Past.
Best Regards,
Joy
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