I recognise all these words, but I have no idea what you are trying to
say.
Why would you want to “launch the .rpm”? You say you have already
installed it. So forget the rpm - it has done its job.
You should read the official docs, and also
this guide in the community pages
Once you have properly installed the application, think about what you
problem really is, how you can test it, and then post here with more details.
Some things for you to think about:
Can you run the application from the command line? (In the template and
in qubes that use it.)
Is a menu item created?
If there is a menu item, does it work?(template and qube)
In this case you say there is an icon - I assume you mean in the menu.
So focus on whether you can start the application in template and in
qube: use the command line to see if it will open or if there are error
messages.