@florianSB Thanks for reaching out and letting us know. I'll pass this along to our Accessibility Team (unless you've noticed a change since originally posting this) and will let you know if/when they have any additional thoughts.
Fawkes (they/them) Project & Community Manager - Microsoft Edge
@florianSB thanks for reporting this issue. We are aware of this and are working to wire up Speech recognition in the upcoming future versions of Edge for our customers. Once this feature is out in Canary, I will let you know so you can try it out.