Okay, this is minor but before Mia moves in, she delivers the parcels to us and afterwards, we just wake up in the morning to find some magical santa has left a parcel at out doorstep before Mia even went to work.

As someone who works in delivery myself, this kind of irks me for multiple reasons. Like who is that poor sod who has to do express deliveries before Mia even went off to work? Why did the delivery window change after Mia moved in? Where she lives should have no influence on her job. And lastly, why do they bother?
I work in delivery myself and I know for a fact that, especially in a pandemic setting, the most likely scenario is that Mia would sign off on the parcels at work and then take them home with her after work is done just to shorten her work day by 5 minutes. We could have some cute scene where Mia walks in, chucks the parcel to you, gives a hug to Olivia (30% chance for her to be there) and then goes change her clothes.