Rochester NY here, I definitely hear it in Toronto / Ontario residents in the words "about" and "sorry", but I wouldn't go so far as to say it sounds like a-boot and soo-ry. I think that's an extreme exaggeration. The one word that's always a dead giveaway for me though is the word "process".

There's something about the O sound that's just more....O pronounced I hear when visiting the Ontario area. Although, I think it's rather us in the Rochester area that mispronounce it as AH more than O...we say PRAHcess and RAHchester rather than PROcess and ROchester. 🤷‍♂️