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Sai Shanmukh 15Sai Shanmukh 15 

when opportunity is closed won related quote should update!

when an opportunity is won or lost all related quotes are updated won=accepted lost =denied using flow.
SubratSubrat (Salesforce Developers) 
Hello sai ,

You can do this by record triggered flow , for the reference you can follow this article -> https://developer.salesforce.com/forums/?id=9062I000000R77eQAC

If this helps , please mark this as Best Answer.
Thank you.