Screen touch function is available for some models only and you can turn on/off the touch function in the settings.
Try this
Windows 10 product
➔ How to turn [On/Off] in the LG Control Center app
① In the input window at the left bottom of the screen, find and select [LG Control Center].
② Click [LG Control Center] - [System Settings].
③ In [System Settings] - [Touch Screen Setting], you can turn it on/off.
Windows 11 product
➔ How to turn [On/Off] in LG Smart Assistant app
① After clicking the search icon at the bottom center of the screen, search for and select [LG Smart Assistant] in the search window.
② In [LG Smart Assistant] - [Dashboard], you can click the [Touch Screen] icon to turn it on/off as well.
➔ How to turn [On/Off] in task manager
① Right click with the mouse button on the [Start] button at the left to the screen or press the [Windows + X] keys on the keyboard to run device manager.
② Find and select a human interface device.
③ After right clicking with the mouse button on the touch screen with the HID standard, select [Use Device] or [Don’t Use Device].
This guide was created for all models, so the images or content may be different from your product.