Plugin Payment method not be visible on checkout page

I have installed Nexi XPay and configured with testing keys as [
Blog Link : https://developer.nexi.it/en/area-test/api-key

CMS Plugins

Here are the API keys to use with the plugins made available by XPay:

• Api-Key implicit accounting terminal 97061508: 5d952446-9004-4023-9eae-a527a152846b
• Api-Key explicit accounting terminal 99999986: 2d708950-50a1-434e-9a93-5d3ae2f1dd9f

]

But on checkout page , payment gateway form or button has not visibled.
I have also install new one wordpress and woocomerce fresh and implement it on that project.
It was not working .

Means there are something wrong, can you please check it and tell me what i need to do.

Note: I have tested with live keys as well , It was not working.

Please suggest me what i need to do

Note: WordPress version : 6.6.2, Woocommerce version: 9.3.2 and Nexi XPay 7.3.4

The page I need help with: [log in to see the link]