I can't add cards my Apple Watch wallet
After I added my VISA card to my iPhone wallet, I tried to add the card to my Apple Watch wallet by clicking "add card" from Watch app on the phone. But I got "Software update required to add this card" message. I was able to add my old card to my Apple Watch wallet about a year ago by doing the exactly same way but not this time. My phone is iPhone 8 with latest iOS (14.5.1) and my watch is 1st gen with watchOS 4.3.2.
Apple Watch