I've been waiting for a delivery (of gluten free food so reasonably essential). I've just found a card dumped in the middle of my path to say they attempted to deliver at 7.45 but I wasn't in so they left it at "door x". I live on a long road, x is a good 30 houses away on the opposite side and there are 6 or 7 door xs on different side streets that are nearer. I'm obviously not knocking on all those doors to get it back. I was also in at 7.45, in my kitchen which is near the door and no-one came to the door.
But in any event, I don't think they should be trying neighbours at the moment. My next door neighbour has covid at the moment and wouldn't order for themselves but might accept a parcel out of habit. Others are vulnerable and don't need extra contact risks.