You can get the home delivery, but the common thing is to get it delivered to the post office, which is usually in the grocery store closest to you. (The dedicated post offices died a few decades back afaik.)

So I get a notification in the post app, or by mail or sms, depending, and then I just pick it up wherever I’m getting groceries. Same thing happens if someone tries to mail me something that doesn’t fit in the mail box.