magento2: VAT ID won't appear in checkout shipping address unless the customer/create_account/vat_frontend_visibility is Yes

As the title says, currently users cannot enable address vat_id only on the checkout page because it won’t show unless the option customer/create_account/vat_frontend_visibility is enabled. This option clearly refers to the account creation.

There’s no apparent reason why that is, other than that the system is configured to check this configuration option instead of the customer/address/taxvat_show option. This option clearly refers to the customer’s address settings.

This is a bug because currently if we want to show vat_id in the addresses we also have to show it in the registration page. This doesn’t make sense when there are two configuration options for each one.

Preconditions (*)

1. Magento 2.4.1 - 2.4.3

Steps to reproduce (*)

1. set customer/create_account/vat_frontend_visibility to No
2. set customer/address/taxvat_show to optional or required
3. visit the checkout page

Expected result (*)

1. the vat_id field should show in the address because of the setting customer/address/taxvat_show being optional or required

Actual result (*)

1. VAT ID doesn’t show up

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Please provide Severity assessment for the Issue as Reporter. This information will help during Confirmation and Issue triage processes.

• Severity: S0 - Affects critical data or functionality and leaves users without workaround.
• Severity: S1 - Affects critical data or functionality and forces users to employ a workaround.
• Severity: S2 - Affects non-critical data or functionality and forces users to employ a workaround.
• Severity: S3 - Affects non-critical data or functionality and does not force users to employ a workaround.
• Severity: S4 - Affects aesthetics, professional look and feel, “quality” or “usability”.