Hello, Greetings for the day.
Reading your requirement to develop a function in admin, so they can put the products in Violatepaypal list, and if some user select that product and tries to checkout then disable or hide PayPal payment option and show a message "this item [productname] prevents Paypal checkout"
We are a team of full stack developers, we like to have this opportunity and help across your project.
We can get you the exact work done as you required and can start the project immediately after you assign it to us.
Looking forward to hearing back from you!!
Thanks.
AS