Apple wallet- double click is not working

Launch Settings on your iPhone

. Step 2: Tap on Wallet & Apple Pay. Step 3: Toggle the Double-Click Home Button switch to enable or disable this feature (it's on by default).  

Apple wallet double click not working on iPhone XR. It’s turned on in settings. Also only wallet pay opens when I try to open wallet.

See if this helps.....https://www.payetteforward.com/cant-double-click-to-pay-on-iphone-heres-why-fix/