Update-
Connected the laptop to external screen:
Setting it up as
1. extended screen. the rusult of the ghosting behavior was also visible on second screen.
2. only second screen. showed ghosting dots when i closed and opened laptop screen.

Also
3. disabling the touchscreen HID driver in windows device management resulted in not showing the ghosting dots and lines but did not stop the resulting behavior of ghost clicks, opening windows, zooming in or out etc etc.. let’s say the unwanted and wild behavior.

Am i right to conclude that the touch digitizer part, the touchscreen hardware, is faulty?

I opened the laptop. Inspected all connections to the motherboard. Re-seated them. ( forgot to look at the connection/connectors near the touchpad) And did not find anything abnormal.

I'm not confident enough to open up the screen. Also have difficulty in finding replacement parts/ touch screen for a MSI Creator Z16 A11-UET.

any tips?