It is part of Wix Stores, delete it and you can’t use it.
https://support.wix.com/en/article/customer-checkout-with-paypal-in-wix-stores
https://support.wix.com/en/article/request-customizing-the-paypal-button-in-your-cart-in-wix-stores
https://www.paypal.com/uk/smarthelp/article/how-do-i-create-a-paypal-button-using-wix-ts1999
Otherwise, you can look at using Wix Pay API.
https://www.wix.com/corvid/reference/wix-pay.html
https://support.wix.com/en/article/corvid-tutorial-processing-payments
https://support.wix.com/en/article/corvid-tutorial-using-the-corvid-pay-api-to-collect-payments-for-a-single-product
https://www.wix.com/corvid/forum/corvid-tips-and-updates/example-accept-payments-with-wix-pay-api
https://www.wix.com/corvid/example/pay-api-example-using-collections
Thanks for your help! Kind regards, Kim
Now that is sad, why is there not an option to delete that button? Very limited WIX is.