Do all files have a hash / checksum? I am curious If every single digital file has a hash  and/or a checksum. When verifying my downloaded files using hdiutil on mac os, about 90% of my files report some sort of checksum. However, when i download .iso files or ubuntu / windows, img’s or iso’s, i’ve noticed many of my image files do not report a checksum. I always assumed that if it was data, it HAS to have a checksum, or it wouldnt be data in the first place. Could someone please tell me weather or not all digital files have a checksum, and if it is possible to have files with non existent checksums? Thank you for any info!
A hash can be computed for any input, even for an empty input.

Some tools may display the output of some hash function, other tools may not.

If the file is large, it may take some time to compute, so tools may not display the hash immediately, only on-demand.

So this is more a question about specific software than cryptography.