Cannot connect Google Wallet to iPhone X

Google Wallet is an Android app, it does not exist on an iPhone because Google has not made a version available of it for iPhone.

You can download Google Pay on iOS however.

click here ➜ https://apps.apple.com/us/app/google-pay-save-and-pay/id1193357041

You could download Google Pay but there’s really no sense to that, because it is going away in early June 2024. It will no longer be available after June 4.