Came here to say pretty much the same - the two digital cameras I had before the “half-way decent cameras in your smartphone” age (including one which wasn’t that specific model but a similar one from the same generation) both had a DCIM directory.
The only surprise I had around DCIM was at some point finding out that there was a directory with that name inside my Android phone since I expected everything would end up under Photos.
Came here to say pretty much the same - the two digital cameras I had before the “half-way decent cameras in your smartphone” age (including one which wasn’t that specific model but a similar one from the same generation) both had a DCIM directory.
The only surprise I had around DCIM was at some point finding out that there was a directory with that name inside my Android phone since I expected everything would end up under Photos.