Media Library filtering by user not possible

Thanks @Antoniya. I was trying to implement #6 code. And it works but not fully as espected.
Result is checked for media items per page. And if you don't have needed medias for current user on first page you will have empty page, on the next page you can have few medias, on next page another amout of medias... etc. I hope I described well.
But your code give me an idea I'm attaching. Hope it'll help to somebody.

/**
 * Implements hook_views_query_alter().
 */
function mymodule_views_query_alter(ViewExecutable $view, QueryPluginBase $query) {
    if ($view->id() == 'media_library') {
    $media_ids  = [..Get needed ids..];
    // If media ids is empty provide 0 id.
    $media_ids = $media_ids ?? [0];
    $media_content_data = $query->setWhereGroup('AND');
    $query->addWhere($media_content_data, 'media_field_data.mid', $media_ids, 'IN');
  }
}

Ahh, of course! I guess I did my manual testing only with 3-4 media items. 🤦‍♀️ Thank you @Anna D!

Thank you for the code @Anna D, it gave me an idea too. I needed to limit media access per user except for the administrator role. And indeed the contextual filter works well for the view list but not for the widget. Here is what I did, it seems to work:

function mymodule_views_query_alter(ViewExecutable $view, QueryPluginBase $query) {
  if ($view->id() == 'media_library') {
    if (!in_array('administrator', \Drupal::currentUser()->getRoles())) {
      $media_content_data = $query->setWhereGroup('AND');
      $query->addWhere($media_content_data, 'media_field_data.uid', \Drupal::currentUser()->id(), 'IN');
    }
  }
}

Implemeted hook as in #17 and it worked. Thanks.

I have tested #17 on local and found it is working as expected.

I have also tested #17, it does exactly what I need. Thanks.

For those who look for this solution, I have tried the function in #17 but that didn't work. Now, I'm not a good module developer, but with some help from the chatbot I came to this module. It also adds a permission setting View all media.

my_module.module:

use Drupal\views\ViewExecutable;
use Drupal\views\Plugin\views\query\Sql;

/**
 * Implements hook_views_query_alter().
 */

function my_module_views_query_alter(ViewExecutable $view, Sql $query) {
  if ($view->id() == 'media_library') {
    $user = \Drupal::currentUser();
    $user_roles = $user->getRoles();

    // Check if the user has "View all media" permission.
    if (in_array('administrator', $user_roles) || $user->hasPermission('View all media')) {
      return;
    }

    $query->addWhereExpression('AND', 'media_field_data.uid = :current_user_id', [':current_user_id' => $user->id()]);
  }
}

And my_module.permissions.yml:

View all media:
  title: 'View all media'
  description: 'View all media in the media library widget'

#19 why status is "needs work"?

I can confirm that #17 is working as expected.

There are some great workarounds here, but I believe this is a duplicate of https://www.drupal.org/project/drupal/issues/3401726 🐛 MediaLibraryUiBuilder service does not properly allow additional contextual filter arguments Needs work where there is a patch that solves the problem in the original issue for me - it will allow you to add a contextual filter to the media_library widget displays which uses the current logged in user as the media author.