final class TypedTableLocator extends TableLocator {
    /**
     * Get a table instance with generic type inference.
     *
     * @template T of \Cake\ORM\Table
     * @param class-string<T> $className
     * @return T
     */
    public function getAware(string $className): Table {
        /** @var T $table */
        $table = $this->get($className);
        return $table;
    }
}

$Admins = CustomTableRegistry::getTableLocator()->getAware(AdminsTable::class);
debug($Admins); // Linter and PHPStan shows \App\Model\Table\AdminsTable
$Admins = CustomTableRegistry::getTableLocator()->getAware('Admins');
debug($Admins); // Linter and PHPStan shows \Cake\ORM\Table
$NonExisting = CustomTableRegistry::getTableLocator()->getAware('NonExisting');
debug($NonExisting); // Linter and PHPStan shows \Cake\ORM\Table