On a Mac it is easy enough to format an SD card to FAT32 using diskutils, but this doesn't do it quite properly.
Many resources state that for devices like the LCD on the CR10s Pro, the SD card must also be formatted with an "Allocation Block Size" of 4096, and unfortunately diskutils doesn't do this.
You can force the correct settings using ...
Looking at your prints, the problem is possibly related to the fade out height of the BLTouch functionality.
If you look closely at the 20x20x20 mm cube:
half the print is fine (top half of the original correct cube)
the bottom "half" (not really half as it is stretched) is porous (grey, indicating more space allowed than the correct layer height ...