This must be a US thing . But there is no chance in hell here that a delivery guy would just leave a parcel at your doorstep and go , someone has to receive it and sign for it.
Unless a package specifically states that it requires a signature, no delivery service in the US will bother with trying for a signature. We're supposed to ring the doorbell and just walk away as waiting for a signature would add so many minutes and hours to the day/week that we'd never finish and if we had to bring back everything we didn't get a signature for we'd overrun the warehouse in like two days. Like, especially right now, we're operating at levels so far above where we should be for this time of year that Christmas is going to be a slaughter.
For my own work, I always leave boxes flush up against the house either behind something if that exists or just try to get it out of sight of the road. I've moved packages from other couriers closer because they're not taking that extra like two steps up to the house to get it there. If it's small it goes inside the screen door/storm door, if I can see a driveway that goes back behind the house I'll check for a back door because that's going to be safer. A lot of houses don't have that though and there's nothing else for it.
And now with COVID we're actually told to not really knock or ring doorbells or touch houses or anything at a customer location at all unless it does absolutely require a signature. At least with Express we're tracked every 6 seconds and it tags when we scan the package so if someone called and said hey, my package is gone, they can just check and see that yeah I was standing directly in this spot next to the house or if I'm a dumbass, hey I'm standing out in the street so who knows where it is. I don't know what Ground does for that but we're entirely separate companies.
I'd just watch tracking throughout the day. That's what it's there for. And I know the company I work for that I won't directly name is doing the delivery for Playstation Direct (I don't know if it's by Ground or Express though) so I know people will get tracking numbers for that.