I don't think anyone was saying Molly directly stopped them or their family getting a delivery slot. Perhaps you're not familiar with the context of Molly constantly moaning about pandemic restrictions and pretty much everything else tbh, and how tone deaf it comes across when she's been jetting off for holidays, doesn't wear a mask correctly, and is generally alot better off and less impacted by the pandemic than the majority of the population.
Complaining about restrictions meaning she can't shop with Tommy, when she has no need to and could go to the shops on her own, and still complaining even though she managed to get a very quick delivery slot, is very tone deaf when there's thousands of people who can't go to the shop because of shielding, and are struggling to book delivery slots. She should try being a bit more grateful for what she's got instead of constantly moaning about every little issue.