Hi Ebrahim, I am Paulo and I'd like to help.
The pandemic led to its cancellation. It was initially set to launch with dual-screen devices such as the Surface Neo, but the pandemic prompted a shift in focus to 10X for single screens, which eventually became Windows 11.
For more details, you may check this tech article:
https://www.theverge.com/2021/5/18/22442421/mic...
(Disclaimer: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before downloading and installing it.)