The “secured” payments I talk is about credit card payments. In my case, I took direct credit card payment, and my card has been directly accepted. That is “not secured”.
What I call “secured” is when I send my credit card information, I am redirected to my bank’s page, to write the text I received on my phone, to allow the payment.
I don’t know if Paypal or Amazon can do this, I think they do it already.