Add Paypal payment gateway to an existing marketplace app

I have an existing marketplace app that connects sellers and buyers of used items (Node.js + React Native). The app currently uses Stripe as a payment option. I would like to extend the app to use Paypal as well. This is how it should work: (1) The sellers enter their paypal account information to receive payment, (2) the buyer enters payment through paypal, (3) the payment is split between the seller and the platform (e.g., seller receives 95% of the transaction and the platform receives 5%) ..

Useful links (Paypal Marketplace)
https://www.paypal.com/us/business/platforms-and-marketplaces