Hide Default PayPal button(mobile)

Is there a way to hide the default PayPal button? I’m able to hide Venmo from the admin settings but the client wants to hide the default and only show the Pay Later button.

I tried doing it using CSS but cannot because the buttons are in an iFrame, also tried it with action hooks, filters, and template parts.

Also, same with the Credit Card input field on checkout, how can I change the font styles of the input fields?

The page I need help with: [log in to see the link]