Note that Apple Pay also has a very low limit on the number of cards that you can add, presumably because each card occupies an actual hardware slot. In the original iPhone SE, that's only 8 cards, and Apple Cash (the debit card) gets counted as one of those (unless you're remove it manually), then if you have Apple Card (the credit card), presumably it takes another slot, so you're only left with just 6 slots for any other contactless credit or debit card.
How's such a low limit good for the consumer? If you only have 6 cards in total, might as well simply carry all of them in your wallet anyways; I do that already.
Android Pay and Google Pay don't have such tiny, restrictive and anticompetitive limits. I have like 20 different credit cards as contactless in Google Pay without any issues, which is very convenient if you care about bonus categories; same was for Android Pay before it got rebranded as Google Pay.
Plus, in Android, you can even select a third party app to be used for contactless in the "Default apps" — "Tap & pay" settings instead of Google Pay; I know Wells Fargo used to have contactless support in their own app at one point, for example, and was selectable there.