We are trying to integrate paypal checkout into our web app. I can hide the pay later ( credit) and the card option from showing up easily using the query parameter disable-funding=credit,card as indicated here However I still see the options for Pay-later on my Paypal authorize page (https://www.sandbox.paypal.com/webapps/hermes...) (screenshot attached ). How can I disable them from showing up on the authorize page? Thanks in advance.
You can't. You only control the buttons displayed on your own site.
Once on a PayPal page, the buyer can always use any funding source they might be eligible for. It's between them and PayPal, and it's all kept private by design.
(The receiver of a PayPal payment won't ever know whether the payer used one of the above funding sources, or something else like a bank or card or PayPal balance. It's none of their business.)