Is it possible to run different test cases simultaneously if the different test cases are not going to interfere with each other? I guess you could launch katalon recorder for edge and katalon recorder for Chrome and they should be independent. You could also use multiple PCs if you have them.
Use case for this - Trying to walk multiple sites as quickly as possible in case there is issue. The test cases I have can still take 15 minutes. Automating it with Katalon Recorder allows for consistent testing among team members but the time it takes is similar to manually walking site.