Alter Hreflang Based on Language

Alter hreflang
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This will help to alter the hreflang attribute based on the languages of the site. Using this we can set the custom language format (e.g., es-es, en-us).
or

It will perfectly work with multilingual sites as well apart from a single language site.

Installation
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1) Download the module and place it inside the modules/contrib directory or install using the composer "composer require 'drupal/alter_hreflang:^1.0'.

2) Enable the Alter hreflang module from /admin/modules URL.

3) Configuration URL /admin/config/regional/alter-hreflang