Is there any filter option in Stack Overflow. so that I can see only those questions which are having some answers (or no answers) with unaccepted answer. So that I can try to help OP.
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Advanced search is your friend:
So what you need is just type
Unlike the Unanswered tab, this will also give questions that have upvoted answers.
The only downside is that being a search, it's limited to 5000 results which means the oldest question you will find is ~24 hours old.