Hello there,
The dictation in Word does not have automatic correction in current version. The process of voice-to text recognition is already trying to reduce the error rate as much as possible, but it is still unavoidably affected by background noise and speaking accents.
If you see a lot of incorrect words being output or missed words:
Make sure you're on a fast and reliable internet connection.
Avoid or eliminate background noise that may interfere with your voice.
Try speaking more deliberately.
Check to see if the microphone you are using needs to be upgraded.
Hope this resolves your Query !!
--If the reply is helpful, please Upvote and Accept it as an answer--