Does anyone know why the payment methods have been displayed well in SCA but the webstore seem ignore it and go straight to create sales order without processing the payment? Even the credit card details has been entered?

Sorry it's not clear what your problem is. Could you rephrase it, give more details, or show a screenshot?

Thank you @Steve Goldberg. It has been sorted now.

What was the cause and solution?

I think one of the checkbox under website setting not being checked. About automatic payment creation.