Hello,
1/ You may add next custom CSS to your child-theme/style.css or Theme Options -> Theme Custom CSS -> Global CSS
.wc_payment_method iframe {
background: #fff;
}
2/ To fix OR text on the Single Product page you may add the next custom CSS (the path was described in prev answer)
.product-content .variations_button {
flex-wrap: wrap;
}
.product-content .variations_button #wcpay-payment-request-wrapper,
.product-content .variations_button #wcpay-payment-request-button-separator {
flex-basis: 100%;
}
It seems that you had only questions we answered above. If you have any questions, please, make them clear and write us – we will answer those as well.
Regards