You can try using dvh instead of percent:

.artplayer-app {
    width: 100%;
    height: 100dvh;
}

Here is some visualization on how it is different from percent and other alternatives - https://blog.stackademic.com/stop-using-100vh-on-mobile-use-these-new-css-units-instead-adf22e7a6ea9

But if the camera notch is a part of the browser window, I don't think it is possible.