Breaking: #107791 - Report interfaces removed 

Description 

The Reports module has been refactored to use native backend submodules instead of dynamic service-based report registration. Individual reports are now registered as proper backend submodules in Configuration/Backend/Modules.php.

As a result, the following public interfaces have been removed:

• \TYPO3\CMS\Reports\ReportInterface
• \TYPO3\CMS\Reports\RequestAwareReportInterface

Impact 

Extensions that register custom reports by implementing ReportInterface or RequestAwareReportInterface will no longer work. The reports will not appear in the backend Reports module.

Affected installations 

TYPO3 installations with custom extensions that provide reports by implementing ReportInterface or RequestAwareReportInterface.

Migration 

Custom reports must be migrated to backend submodules.

Register as a submodule under system_reports:

return [
    'system_reports_myreport' => [
        'parent' => 'system_reports',
        'access' => 'admin',
        'path' => '/module/system/reports/myreport',
        'iconIdentifier' => 'module-reports',
        'labels' => [
            'title' => 'LLL:EXT:my_extension/Resources/Private/Language/locallang.xlf:myreport.title',
            'description' => 'LLL:EXT:my_extension/Resources/Private/Language/locallang.xlf:myreport.description',
        ],
        'routes' => [
            '_default' => [
                'target' => \Vendor\MyExtension\Controller\MyReportController::class . '::handleRequest',
            ],
        ],
    ],
];

The controller should implement a standard PSR-7 request handler that returns a ResponseInterface.

Alternatively, you can create a standalone module with showSubmoduleOverview enabled if you need to group multiple reports under your own container module.