This is Max from the Shopify Team.
I think what you're looking for is to remove Dynamic checkout buttons from your product page. Check out this help doc for some steps on how to remove the PayPal version.
From, here, you can check or uncheck Show dynamic checkout button, then, Click Save.
Give that a try, then refresh your page to see the change. Let us know if you need any more support, or that wasn't quite what you meant.
I have the same question about removing the "Buy with PayPal" button from my product pages in Debut theme.
All is fine until I get to the bit "you can check or uncheck Show dynamic checkout button".
There is no "Show dynamic checkout button".
What to do?
Also, I notice in the checkout that there are options to pay with G Pay & Shop Pay - do I need to set up accounts with them? Or is it just for the customer to do that?