The US postal service is similar...
If the item fits in your mailbox (letter size), they do that.
If not, they knock, and leave a "we missed you" note if the package is insured. Or leave it on the doorstep if not.
If you get the note, you have to go the post office in two days, during normal office hours (9-5ish), or Saturday morning (9-12). If you don't make in a few days, they return to sender.
But this is only for USPS. If the package is FedEx/UPS/courier, it's the wild west. Sometimes they leave it. Sometimes they leave a note. Frequently they claim they attempted delivery but didn't. And if they miss you a few times, you have to pick it up at the distribution warehouse which could be a 30 min drive away. This is the worst - even for items you know need a signature, there's no guarantee they'll deliver - we ran into this a few months ago with some jewelry - delivery was schedule Monday 12-5pm, we waited in the living room (right by the door) and nobody came. Their system showed a failed attempt (courier lied). Repeated Tues. Called courier warehouse, they asked if we had doorbell video proving the delivery attempt was never made (WTactualFuck). Repeat on Wed. Item was returned to sender. We called sender, asked them to use USPS because private shipping can be a disaster. USPS is often a day slower, but it's fairly reliable.
Some areas have problems with package theft. Fortunately mine isn't one of them, so I'm ok with packages being left.