Not receiving the code is usually due to temporary system load or security measures. You can try resolving the issue by trying from a different IP address or clearing application cookies. Also, don't forget to try again after waiting for a while.
You can share your screen recording with us to resolve the issue. Also, you can use the SMS receive or extend buttons on the numbers page to get the codes again. You can use any country code for WhatsApp.
The non-receipt of the code may be due to operator congestion. If you still don't receive the code after trying 8-10 times, you can try a different service or country.