Cannot resolve method 'getOnBackPressedDispatcher' in API33

I am trying to resolve the onBackPressed() in Activity has been deprecated warning in API33 (Android Studio). Both my compileSdkVersion and targetSdkVersion is 33.

Following the instructions here, I added to the build.gradle implementation:

implementation 'androidx.appcompat:appcompat:1.6.0-alpha04'

(same problem happens with the newer rc01) and imported the callback in the activity (FullScreenBrowser) with

import androidx.activity.OnBackPressedCallback;

Then I added this code to the activity class:

    getOnBackPressedDispatcher().addCallback(this, new OnBackPressedCallback(true) {
        @Override
        public void handleOnBackPressed() {
            // Back is pressed... Finishing the activity
            finish();
        }
    });

But I get an error:

Cannot resolve method 'getOnBackPressedDispatcher' in 'FullScreenBrowser'.

Maybe this has to do with the lack of support of API33 in AndroidStudio? Or maybe getOnBackInvokedCallback is an option?