Walmart in the United States WILL NEVER open Apple Pay and other contactless payments in 2030 or 2040. Remember, you are talking about Walmart, the#1 retailer in the US, in the US economy, and in the WHOLE WORLD! They have almost FULL CONTROL of the US people to buy their products!
For card payments by mobile phone to pay in a Walmart US store, all Walmart has to do is promote their Walmart Pay. Walmart Pay has positive support from most US consumers.
Walmart US can stop the support of Apple Pay and other contactless payments all the way they want to if it is 2030, 2040, or 2050! They STILL WILL NOT lose support from US consumers!