The idea is good but the UI of the sign up page has so many bugs, when click on a field the screen extremely zoom in without reason, is imposible to fill the form.
Browsers on iPhones (and any device in iOS) are not using chrome's engine but (are required to) rely on Apples WebKit instead. Problems ocurring in Android/ Windows/ ... Chrome versions might not be reproducible in those devices.
What are your screen dimensions? I used it on iPhone 12 Mini and it didn’t have those issues. Perhaps, I’m missing something.