I think there is no such way to detect browser back button clicked.
Instead of this you may wrong your logic ondetroy action.
Also check if this can help you
How to Detect Browser Back Button event - Cross Browser

Hi HARI PRASAD BODDU ,

Confirmation message in JavaScript on the back button from the device

Please refer  to the forum discussion

I hope this might help you.

1. Intercept the back button: Use the window.onpopstate event to detect when the user clicks the browser back button.
2. Show a confirmation dialog: Display a confirmation dialog asking the user if they are sure they want to leave the page.
3. Handle the user's response: If the user clicks "OK", allow the navigation. If the user clicks "Cancel", prevent the navigation by pushing the current state back to the history stack.

Add JavaScript to Your OutSystems Page

Follow these steps to add the JavaScript to your OutSystems page:

1. Open your OutSystems application.
2. Navigate to the page where you want to implement this functionality.
3. Add a "JavaScript" widget to your page (you can find this in the "Interface" tab under "Scripts").

2. JavaScript Code

// Function to show confirmation dialog and handle navigation

function handleBackButtonEvent(e) {

    var confirmationMessage = 'Are you sure you want to leave this page?';

    if (!confirm(confirmationMessage)) {

        // User clicked "Cancel", push the current state to prevent navigation

        history.pushState(null, '', location.href);

    }

}

// Intercept back button using onpopstate event

window.onpopstate = function (e) {

    handleBackButtonEvent(e);

};

// Ensure the initial state is added to the history stack

history.pushState(null, '', location.href);