Please read this Angular, Katalon & ngWebDriver.
It works, here is my code for your reference
// initialize angularjs instance
WebDriver driver = DriverFactory.getWebDriver()
driver.manage().window().maximize()// Creating an instance of NgWebDriver
ngdriver = new NgWebDriver((JavascriptExecutor) driver);// Waiting for Angular to finish async activity
ngdriver.waitForAngularRequestsToFinish();
// initialize angularjs instance - EndBankCodeElement2 = driver.findElement(ByAngular.model(“entryCtrl.ngModel.BankCode”));
String BankCode2 = ngdriver.retrieveAsString(BankCodeElement2, “entryCtrl.ngModel.BankCode”);driver.quit();