Using remote access to webcams on other machines is also part of the Windows OS. Has been for as long as I can remember.
You can turn the webcam off in Windows 10. In the search bar type webcam and you will see if it is on or off.
You can then select which programs are allowed to access the webcam and microphone.
This will also notify you if another program tries to access the webcam.
Hope this helps and saves people worrying. It is a real issue.