Ionic v4 WIndows phone display not working

Hello Everyone,

I have issue on ionic v4 in this whenever i execute ionic --lab command it will only display iOS and Android platform not display windows phone platform please help how to fixed it.

Here is my ionic details,
Ionic CLI :- 6.9.2
Ionic Framework :- @ionic/angular 4.11.10
NodeJS :- v12.16.2
npm :- 6.14.4