I am not receiving any verification code from websites or apps on my iPhone

I hope this message finds you well. I am reaching out because I have not been receiving the verification/code on my iPhone from any organisation or any apps. Despite multiple attempts, the code hasn't come through via SMS.

I have checked the following:

• Confirmed my phone number and email address are correct
• Ensured my phone has signal and is not in airplane mode
• Verified that the messages are not being blocked or filtered into spam

Could you please assist me in resolving this issue? Let me know if there are any alternative methods to receive the code or if additional troubleshooting steps are needed.

Looking forward to your response.

[Re-Titled by Moderator]