I’m having this same problem. It’s across all of my Apple devices. MacOS, iOS, iPadOS, and all browsers. Strange female voice that talks slow. Doesn’t matter what I select. I’m beta testing all of the Apple OS 26 versions now, and it’s happening there. Anyone else still having this issue?
Here on my android smartphone exactly the same. I have set the female voice sol but when I try to change it the same voice is always retained during voice mode.