It also seems that every other country on this world uses bank provided terminals en masse, which makes it VERY easy to deploy things like contactless (but also very hard on customizing it to your needs). In the US, most stores use proprietary systems for each store, which are fully integrated with the POS, rather than bank provided equipment. (Which explains why most mom and pop stores in the US have Apple Pay, because like Australia, they choose to use the bank provided equipment, rather than a full POS system). No sane store like Walmart in the US is going to use standalone bank provided bank terminals.
Now, bear in mind that Walmarts in other countries around Europe (such as ASDA) do have contactless enabled, but not in other markets such as Canada, Mexico, and the US. CA/MX/US Walmarts use the same Ingenico iSC250 setups with no contactless enabled. In Europe, Walmarts use the Ingenico iPP350, but with contactless enabled....it isn't bank provided, still Walmart provided equipment.
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Something called EMVCo Certifications. These are still very backlogged, as they had a whole country the size of a continent with billions of different point of sale systems and credit card readers all wanting certifications at once. Whereas in other countries, they just had to certify a few bank provided models, and those were what you had to choose from.