11 files declare their use of AccountProxyInterface in Drupal 10

AuthenticationSubscriber.php in core/lib/Drupal/Core/EventSubscriber/AuthenticationSubscriber.php

FormBuilderTest.php in core/tests/Drupal/Tests/Core/Form/FormBuilderTest.php

Contains \Drupal\Tests\Core\Form\FormBuilderTest.

LinkAccessConstraintValidator.php in core/modules/link/src/Plugin/Validation/Constraint/LinkAccessConstraintValidator.php

PrivateTempStore.php in core/lib/Drupal/Core/TempStore/PrivateTempStore.php

PrivateTempStoreFactory.php in core/lib/Drupal/Core/TempStore/PrivateTempStoreFactory.php

ProtectedUserFieldConstraintValidator.php in core/modules/user/src/Plugin/Validation/Constraint/ProtectedUserFieldConstraintValidator.php

SharedTempStore.php in core/lib/Drupal/Core/TempStore/SharedTempStore.php

SharedTempStoreFactory.php in core/lib/Drupal/Core/TempStore/SharedTempStoreFactory.php

TempStoreDatabaseTest.php in core/tests/Drupal/KernelTests/Core/TempStore/TempStoreDatabaseTest.php

ToolbarLinkBuilder.php in core/modules/user/src/ToolbarLinkBuilder.php

WorkspaceManager.php in core/modules/workspaces/src/WorkspaceManager.php