@wrongway The Windows SAPI Speech Profiles are specific to an individual voice and the microphone hardware used for the training. If either of these things change significantly, you will want to create a new Speech Profile and run through training (completely through, at least 3 times).
The good news is that once you do this, you can backup this Speech Profile, and you can restore it from that backup in the event you have to reinstall Windows, or move your hardware to a different PC (using the same mic from training).
Windows_Speech_Profile_Backup_Tool.zip
All that said, it has been reported more than once on VoiceAttack Forums and Discord that the mic on the Quest 3 is pretty bad at speech recognition in general. Pretty much any mic that allows for such distance between our mouth and the microphone may inadvertently pick up background noise which makes it less than desirable for speech recognition - such as webcam or area mics, and including the Quest 3 mic. Your mileage may vary - comes down to the user, their voice and speech patterns, and the ambient sound volume in the room.
If you need any further specific help, feel free to post up on the VoiceAttack Forums or Discord - Pfeil knows all the tricks, and plenty of the rest of us are very adept at these tips and tricks, too.
Best wishes and good luck!!
[edit: also, this post should really be moved to the Voice Control forum section here, in the event it helps other people in future]