On Oct 10, 2019, Microsoft team had published a pre-release version (WinAppDriver v1.2) which includes a new capability ms:waitForAppLaunch. With this capability, you will able to wait longer for your app to open.
In addition, you will also need to install Appium version 1.16.0 or later for supporting WinAppDriver 1.2.
To use ms:waitForAppLaunch capability in Katalon, you could go to Project Settings and add it to the Desired Capabilities section.
Note: “The limit for this is 50 seconds”. So, don’t set it so long /=).
~ Hope this could help! /=)