Logging Keypresses within iFrame - is it possible??

Birte
Just including a post I found on Stack Overflow. Let me know if it helps.
javascript - Listen for mouse click and keypress events within iframe - Stack Overflow

Thank you for your help! I checked out the link but the code only seems to work, if the domains of the parent and child page are from the same origin. I am using an iframe to open an URL to an online tetris game (https://lucasrmagalhaes.github.io/github-games/%22), which is not from the same source as Qualtrics.
Do you have any other alternatives in mind?
Thank you so much in advance!

Birte
I am not sure how useful this suggestion would be but hope it helps!
You can detect the iframe on the screen by using Intersection Observer https://github.com/WICG/IntersectionObserver
javascript - How to get the height and width of an iframe - Stack Overflow
Post which you can use something like (Use JavaScript to Detect What Key the User Pressed - CodeinWP):
window.addEventListener('keydown', function (e) {
document.querySelector('p').innerHTML = `You pressed ${e.key}`;
}, false);
It will detect the whole window for a keypress and not just within iFrame.
I also think you should have a look at this page if you are facing an issue of parent and child not from same source
javascript - How to use keypress event in an iframe input from its parent page? - Stack Overflow
Hope it helps!