Zend certified PHP/Magento developer

In Magento2, Region/State is not showing on address in checkout page

I’m barely new to Magento2 and Magento in general.
The version I’m using is —-> 2.4.3-p1

I’m facing this issue: when I add a new Address in checkout page, it doesn’t show the Region/State field, but just the city.

I don’t know why this is happening, also if I try to checkout with that second address, I got this error Please specify a regionId in shipping address.

So I’m trying to solve these issues.

In this screenshot I’m showing you the problem with that missing Region/State text.

For formatting the addresses I’ve created these two files, overwriting them:

  1. app/design/frontend/Magenio/vyvo/CommunityEngineering_JapaneseAddress/web/template/checkout/shipping-information/address-renderer/jp.html

  2. app/design/frontend/Magenio/vyvo/CommunityEngineering_JapaneseAddress/web/template/checkout/shipping-address/address-renderer/jp.html

And everything works fine, except for that missing text and the error when doing the checkout choosing the second address.

enter image description here

If you can help me understand guys it would be awesome, thanks!