<?php
use Microsoft\Graph\Beta\GraphServiceClient;
use Microsoft\Graph\Beta\Generated\Models\TenantGovernanceServices\GovernanceRequest;
use Microsoft\Graph\Beta\Generated\Models\TenantGovernanceServices\RequestStatus;
$graphServiceClient = new GraphServiceClient($tokenRequestContext, $scopes);
$requestBody = new GovernanceRequest();
$requestBody->setStatus(new RequestStatus('accepted'));
$result = $graphServiceClient->directory()->tenantGovernance()->governanceRequests()->byGovernanceRequestId('governanceRequest-id')->patch($requestBody)->wait();