Hi @Elanchezhian ,
Thanks for reaching out and apologies for the delay in response.
If you are using user flow, you can update the country code drop down list with the country code 'US' only using localization Strings.
You can select the user flow you want to update and select Language under customize:
Select Multifactor authentication page, and then select Download defaults (en).
Open the JSON file that was downloaded in the previous step.
In the file, search for countryList and replace value with below and upload the file.
{
"ElementType": "UxElement",
"ElementId": null,
"StringId": "countryList",
"Override": true,
"Value": "{\"DEFAULT\":\"Country/Region\",\"US\":\"United States\"}"
},
Now MFA page will show only US code.
If you want to remove, drop down box too then you need to customize the page using HTML and CSS.
Hope this will help.
Thanks,
Shweta
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