The problem with Dragon was that it was so inaccurate that a moderately skilled typist could produce final corrected text much more quickly than they could dict

The problem with Dragon was that it was so inaccurate that a moderately skilled typist could produce final corrected text much more quickly than they could dictate text and then make corrections. Looking online, this is a feature Apple is adding in this year's iOS and Google is adding to Pixel devices only so far, so I would expect to have to give them some time to get on device speech recognition working at all as a first step.