magento2: Can't place order on admin: "regionId" is required

Preconditions

Magento 2.4-develop; Magento 2.3.6;

1. Two websites;
2. Disable all countries for the default scope (General > Countries > Allow);
3. Enable United States on one website (General > Countries > Allow);

Steps to reproduce

1. Go to Admin > Sales > Orders > Create order;
2. Select the website used on Preconditions step 4;
3. Add a product, fill the addresses using United States as country; Note that the region field is a text field instead of a dropdown with the states
4. Fill the payment method and shipping method and place the order;

Expected result

1. Order is placed successfully;

Actual result

1. Error Please check the shipping address information. "regionId" is required. Enter and try again. is shown and the order is not placed.

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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”.