Wondering if I am getting discriminated during hiring process due to stutter

Wondering if I am getting discriminated during hiring process due to stutter I work as a Product Manager for software products and been in the job market for almost 1.5 yr now. There have been 10+ instances where I completed the entire hiring process and the final decision wasn't in my favor. Every time I received the generic response that we went with the candidate with more experience or more aligned to our needs. During couple of interviews, I mentioned I have a stutter to hiring manager and next day I was rejected for the role. I can't help but wonder if it's because of stuttering instances during interviews or it's just bad luck in this job market. Is there a way to confirm what the decision might have depended on? It's very frustrating and demoralizing. And after all these interviews I feel my confidenc is shaken and in turn it shows up in stuttering. A vicious cycle we are stuck in.