Hello @Anand Raj , welcome to the Microsoft Q&A forum.
Just confirming that you have followed this troubleshooting guide and it did not help resolve the issue. If it helps you can follow below mentioned additional troubleshooting steps to further debug this issue.
- Troubleshoot Azure VPN Gateway using diagnostic logs, you can troubleshoot multiple VPN gateway-related events including configuration activity, VPN Tunnel connectivity.
- Perform a packet capture on your S2S VPN to help pinpoint this issue.
Hope this helps! Please let us know if this does not help resolve the issue. Thank you!