In this instance I probably wouldn’t worry if everything looks ok?
If you’re ordering anything in the future of particular value that you don’t want to go missing then maybe it might be worth choosing a local pickup point instead? I know the likes of Hermes, DPD and a few others allow you to get your stuff at a local shop. That way you can go collect at your leisure and don’t need to worry about it going rogue on you.
In general I don’t trust people in communal areas. It’s not really a case of not trusting neighbours, but more not trusting people that might be in the building that dont live there. A flat I used to live in had an intercom and because I was on the ground floor I always got buzzed to let people in upstairs, I never did as you dont know who they are, but some people dont always care and let anyone wander about.
I guess im just wanting to avoid any potential hassle with valuable items, especially at the moment, Customer Service teams in most industries are hard to get hold of and I’d hate to get into a dispute where the courier is claiming delivery and you havent received anything