Paypal "NO CODE" button integration (NO API and SDK)

I'm reading on paypal website that is possible a "NO CODE" paypal button integration.
Has anyone in community used this solution?
Does a step by step guide /tutorial for MIT App Inventor exist?
Thank you!!!

https://groups.google.com/g/mitappinventortest/c/koCvm0y1IZo/m/POVK7Rmh_VoJ

For in-app purchases, not donations...
Someting like paypal one-time buy