Don't know where you get your apples but I can buy 1 if I want. Just not at the supermarket since they optimise to sell you more than you need. No regulation involved here.
I believe it was both in Albert and Aldi (during 2023). Felt really awkward to waste fruit, but that's nice that there are sanity among other stores. I get it that folks can be annoyed when I hand pick my potatoes at the grocery store to match for size and to have good coloured exemplars, but to pick and choose is one of the few delights buy groceries.