Unnecessary payment method of adani one at Trivandrum airport

This is probably a non-issue but sharing it since it is just annoying. I need to share my phone number, agree to terms and conditions for adani one if I need to buy anything here. Why can't they just provide a normal UPI id for this? There are some reward points for this (that I can get by logging into an account with the phone number I just had to *mandatorily* provide to proceed with the payment). As someone who generally denies providing phone number at every shop, I cannot understand why this is not optional. Last year in Manyavar when they could not provide bill without giving a phone number, I thought it was a rare incident. Is this going to be the norm from now on? TLDR: Lazy person don't like extra step of adani one payment in Trivandrum international airport.