Hi there,
As you mentioned, all fields are displayed within <iframe> elements. This is to provide a secure experience for customers.
However, you can edit this with CSS. We have written a guide in our public documentation which outlines how to approach this. You can read about it here: https://woocommerce.com/document/stripe-styling-fields/.
Please follow the steps outlined in this article, and let us know if you have any issues!
Have a wonderful day!
