Raspberry official touch screen windows 10 Arm64 driver

I have succeded on to run full Win 10 on raspberry pi with official raspi touch screen. I have just a problem that the touch screen can not work. I think the touch screen driver has not prepared,yet.

I need to run touch screen, urgently.

I can donate to developer for this development.

I know that windows iot has “Hid-Compliant Touch Screen” driver for this.
if the source code exist about this driver, I think it can compile for arm64.
is anybody have information about the source code?

For helping…
I have found a video about old versions of IOT windows.
At that time Microsoft has not published official pi touch driver. And that man made some tests about touch screen. He said that the touch screen chip is FT5206.
It is sheet https://www.buydisplay.com/download/ic/FT5206.pdf