To access the meta tags field data created by the Metatag module you can use the Metatag Manager service.
$metatag_manager = \Drupal::service('metatag.manager');
First, get the tags from the entity (usually from a node):
$tags = $metatag_manager->tagsFromEntityWithDefaults($node);
and then generate the meta tag values:
$metatags = $metatag_manager->generateTokenValues($tags, $node);
About the Author
Goran Nikolovski is a senior web developer who loves working with Drupal, React, and React Native. He is the founder of this website and he enjoys sharing his knowledge. Need help with anything? Get in touch.