How can someone function and be 15 months into the pandemic and not come across a check-in system before?
If Aldi isn't doing a check-in, that's either their fault or maybe they don't require one. Although I think they now do. As others have said, other states have had check-in for supermarkets this whole time.
Would you prefer the government sends a party member to every store to enforce check-in, or try and rely on peoples ability to do the right thing? I know you can never rely on that, but at some point it's the only practical option.