fixed

css/theme-overrides.css

@@ -0,0 +1,3 @@
+.test {
+background: #000;
+}

theme_overrides.info.yml

@@ -3,3 +3,6 @@ type: module
 description: Provides additional functionality for the site.
 package: Custom
 core_version_requirement: ^9 || ^10
+
+libraries:
+  - theme_overrides/global

theme_overrides.libraries.yml

@@ -1,9 +1,9 @@
 # Custom module library for general purposes.
-theme_overrides:
+global:
   js:
     js/theme-overrides.js: {}
   css:
-    component:
+    theme:
       css/theme-overrides.css: {}
   dependencies:
     - core/drupalSettings

theme_overrides.module

@@ -4,3 +4,24 @@
  * @file
  * Primary module hooks for theme_overrides module.
  */
+
+
+use Drupal\Core\Asset\AttachedAssetsInterface;
+
+
+/**
+ * Implements hook_css_alter().
+ */
+function theme_overrides_css_alter(&$css, AttachedAssetsInterface $assets) {
+
+  $library = \Drupal::service('library.discovery')->getLibraryByName('theme_overrides', 'global');
+  $path = $library['css'][0]['data'];
+
+  if (isset($css[$path])) {
+    $css[$path]['group'] = 300;
+  }
+}
+
+function theme_overrides_page_attachments(&$variables) {
+	  $variables['#attached']['library'][] = 'theme_overrides/global';
+}