Like all these factoids about death it’s impossible to know for sure since by definition none of the subjects are able to tell anyone what the last thing they sensed was. There’s not going ot be a definitive answer.
And of course it’s going to depend on what the person is dying of. A person dying from a severe infection in both ears is probably going to suffer hearing loss first for example.
However sight does require an inordinate amount of energy to keep running. As a result people suffering from conditions that reduce energy availability will often experience vision problems. It’s not beyond belief that vision would be the first sense to go for many dying people.
How anyone could possibly judge whether hearing, touch or smell went last is beyond me. There’s just no possible experiment, physiological fact or even anecdotal evidence that could justify that conclusion.