Authentication with App Bridge 4

[HeartCoding]

I was wondering if you are working on a solution for app bridge 4.
Especially for embedded apps to redirect to the targetUrl in the iframe_redirect.html file.
If I see it correctly it is no longer possible to use the Redirect method.
I tried the following solutions but they don't seem to work:

const targetUrl = '{{ redirect_uri|safe }}';
window.open(targetUrl, "_top");

or

const targetUrl = '{{ redirect_uri|safe }}';
navigation.navigate(targetUrl, {
    history: 'push',
});

Any help would be greatly appreciated.
And thanks a lot for maintaining this repository

[stlk]

window.open(targetUrl, "_top"); should definitely work. Does browser console say anything?

[HeartCoding]

I've just again tested the method but unfortunately it does not work for me.
I get the a 404 "There's no page at this address" with no error in the console.
I've double checked the URL and it should be fine.
The old method with App Bridge 3 still seems to work correctly but would you mind sharing an example for this file in App Bridge 4?