DocblockVarArrayFromGetterReturnRector

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Add @var array property docblock from its getter @return

 class SomeClass
 {
+    /**
+     * @var int[]
+     */
     private array $items;

     /**
      * @return int[]
      */
     public function getItems(): array
     {
         return $this->items;
     }
 }

Configure your rector.php:

<?php

use Rector\Config\RectorConfig;
use Rector\TypeDeclarationDocblocks\Rector\Class_\DocblockVarArrayFromGetterReturnRector;

return RectorConfig::configure()
    ->withRules([
        DocblockVarArrayFromGetterReturnRector::class,
    ]);