Although this error doesn’t happen frequently, it can be frustrating if you need to do something important on Telegram. Before we get started on ways to fix the Telegram not sending code error, let’s learn when Telegram sends verification codes and why.

When Does Telegram Send Verification Code?
The Telegram One Time Password (OTP) is a verification code that is sent to users to verify their ownership and keep their accounts secure. When should I receive a verification code on Telegram? You’ll receive a verification code after you have:

Opened a new account on Telegram.
Logged in to your account with another device.
Requested a new password.

6 Best Ways to Fix Telegram Not Sending Code Error
1. Don’t Resend Code Too Many Times
Most of the time, the Telegram verification code takes more time than usual to be received. After a code is sent, there is always an option to resend the code, but this is not always the fastest way to get the code.

If you tap the “Resend Code” button too many times, you’ll also get an error notification saying “Too Fast.”

2. Poor Network...

Source: https://www.hownaijablog.com/2022/08/telegram-not-sending-code-best-ways-to-fix-it.html