Try attaching a usb external keyboard to test. If that works ok use that. Replacing the KB is a difficult task. See this-

https://www.parts-people.com/blog/2019/04/08/dell-xps-13-9370-p82g001-keyboard-removal-installation/

Make sure the KB is clean and doesn't have anything between the keys--crumbs, dust, dirt, etc. Gently turn laptop over and tap. 

So i plugged in an external KB and it worked fine so i guess the that problem is not in the drivers(?) .

I want to fix the laptop KB so what should i do except than replace all the KB?

@Mary G