@Paul211
If you are overseas then it is the responsibility of the roaming network to complete the delivery of the SMS to your device.
A few things to try,
- Reboot your phone
- Choose another network
- Turn off 5G
Also note that SMS is not secure and not a guaranteed delivery method of using OTP's
- Xperia 1V - o2 and Spusu
- Pixel 8 Pro - o2 and Vodafone UK
