Hi,
What do you want?
There is no "download" of Kivy in VsCode. VsCode is an IDE, you need to install first Kivy in your coding environment before working with it.
After you have done that you can install some extensions of VsCode that can help your coding with Kivy (for exemple "Kivy" extension done by BattleBas or "Material Kivy" from haddie barky).
But in my case VsCode has some problem with Kivy because it doesn't recognize well the kivy librairies and you cant have some false error messages.
With Kivy I pefer use PyCharm the IDE of JetBrains.