Hmm, interesting p.o.v maybe they could allocate a section of packages in the calendar as in "Package Tracking". It's simple logic that you would have package entry for the date it due to arrive not the day it was ordered

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I like the fact that it adds the package entries into the calendar although I do not like it adding across every account lol. I have several outlook accounts and it's a pain. Why I have that many - simple compartmentalization - it gives me greater control and flexibility

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Furthermore my other niggle is that it adds the full address of the package delivery, if for instance if you left your phone on a cafe table and you have your calendar set for glance or lock screen detailed info - people will be able to see exactly where you live - oops. That in my mind does pose a security risk.
To negate that they can simple have the outline "package delivery - unlock to see more information" on glance / lock screen.