Hi,
Since the issue started immediately after the screen replacement, it is likely related to the replacement screen or touchscreen digitizer.
Try searching for "Calibrate the screen for pen or touch input" in the Windows search bar. Open it, then click Setup or Calibrate under the Touch section and follow the on-screen instructions.
If that does not help, open Device Manager, expand Human Interface Devices, right-click HID-compliant touch screen, select Uninstall device, then restart the computer.
If the issue persists, I recommend contacting the technician or repair shop that replaced the screen, as the replacement display may not be properly configured or compatible with your Lenovo laptop.