This data set was released years before the Covid hypergrowth phase which they are referring to.
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That's fair as the Kaggle dataset[1] is from 2017. Even assuming orders scaled with revenue (which grew to $1.5B in 2020[2]), you'd only reach a few hundred orders/minute at the pandemic peak (which lines up with the calculation above via a different method).
So I still assume the original comment isn't referring to actual orders placed.
[1] https://www.kaggle.com/datasets/psparks/instacart-market-bas... [2] https://fortune.com/2022/05/18/what-to-know-instacart-ipo/