How do you change a file a hosting service uses to start a server

I’m using ‘game-host’ (it’s literally called game-host) service and I want to run a 1.18.1 forge modpack. The problem is that the forge installer gives me a run.bat file instead of server.jar and that service requires that file (I don’t know how to change it). Is there a way to get a .jar file which will work with forge 1.18.1?

I just talked to my host provider and they fixed it up for me.