I can understand why the OP may feel uncomfortable. I agree that it is not something to spend a lot of time thinking about or to get too worked up over.
However, if the delivery person was just making small talk, maybe she would mention it to the OP once or twice. But then to carry on the conversation and basically "tattle" that the wife gets a lot of packages is a bit over the top. I mean maybe all the packages are really for the husband. Maybe the wife can buy whatever she wants and the husband doesn't need to know. It is that part of it that seems like the delivery person is going beyond "small talk."
I doubt it is tattling. Our Amazon account has my name on it. All the packages come addressed to me, the mail person would know who they are addressed to, so I wouldn't find it odd for someone to say that "you wife gets a lot of packages."
I really doubt she is judging you, OP.
Last year, Amazon shipped an estimated 1.22 billion packages in the U.S., according to MWPVL International, a supply-chain consultancy. In 2017, there were about 126.22 million households in the United States.