The "Middle name" field is not displayed"

The workaround is documented in the module docs: https://docs.drupalcommerce.org/commerce2/developer-guide/customers/addr...

We have now enabled the additional_name field for countries that use patronymics (BY/UA/RU/BG/AZ/KZ/UZ): https://github.com/commerceguys/addressing/commit/0e0ab2b7e8c77c4bf60a9b...

That will land once a release is made for the next major branch.

Next up, enabling the field for countries that use middle names. Please continue on in 📌 Gather the list of countries that should have the middle name field Closed: won't fix and the related addressing issue.

Automatically closed - issue fixed for 2 weeks with no activity.

Middle name was closed won't fix for US addresses in the library: https://github.com/commerceguys/addressing/issues/192

If you need to enable the middle name field for US addresses in Drupal, this patch will allow support for it, but this is unlikely to be accepted, so you might choose to custom program a middle name field instead.

This patch only affects US addresses.