@bintama30917856fvki It is quite possible that the DNG file (for which you see a filename on screen) is a totally black image, yet it may still contain all the edit adjustments that an edit preset might apply. (ie. 90's-4)
I just tested and , Yes!, you can have a 'Black' DNG image from which you create a Preset.
After a DNG with edits is imported to Lightroom, [Create a Preset] will use the adjustments from the metadata of the file, even if it looks 'black'. Any image, of any size, as a DNG, can be used to carry edit metadata from which to create a Preset.