Please do an update to latest iOS, version 17.3.1. Then do a forced restart and lastly reset your network settings. Support articles with instructions are below.
Please update your iPhone to the latest iOS, 17.3 or higher. Older iPhones may only support 15.7.5, but Apple Pay will function.
Update iOS on iPhone - Apple Support
Once updated, please do a forced restart of your iPhone.
Force restart iPhone - Apple
- Press and quickly release the volume up button.
- Press and quickly release the volume down button.
- Press and hold the side button.
- When the Apple logo appears, release the side button.

Reset your network settings
If you're using iOS or iPadOS 15 or later, tap Settings > General > Transfer or Reset [Device] > Reset > Reset Network Settings.
If you're using iOS or iPadOS 14 or earlier, tap Settings > General > Reset > Reset Network Settings.
This also resets Wi-Fi networks and passwords, cellular settings, and VPN and APN settings that you've used before.