What is the maximum acceptable time for the “Waiting for Review” status?

I have a question. After how many days in the “Waiting for Review” status should I conclude that there is an issue with my app review request and contact the support team?

Thank you for your post. We're investigating and will contact you in App Store Connect to provide further assistance. If you continue to experience issues during review, please contact us.

What is the maximum acceptable time for the “Waiting for Review” status?
 
 
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