I put together this quick, single layer test print to test the levelling setup of my Creality Ender 3 v2, with CR Touch. The model consists of a 0.2mm thick pattern, that is designed to be printed as a single layer (with matching layer thickness of 0.2mm).
This model can be imported into your slicer of choice, just be sure to set the layer height to 0.2 and add any required levelling gcode to your custom gcode.
The provided gcode file is for the Ender 3 with PLA (Creality PLA) and completes the following before printing:
The author hasn't provided the model origin yet.