To achieve this, you need to manually create an SD-WAN rule to route
certain traffic through the backup link. This is expected behavior, as
all your traffic currently goes through the main link.
Hello, you may refer this article it will help for you and share your
feedback.
https://community.fortinet.com/t5/FortiGate/Technical-Tip-How-to-access-a-firewall-from-a-FortiGate-Cloud/ta-p/290424
To use an unsupported transceiver on a FortiGate firewall, you need to
enable third-party transceivers by running the following command in the
FortiGate CLI: config system interfaceset allow-unsupported-transceiver
enableAlternatively, on some FortiG...
Perform a basic speed test on both fiber and mobile data networks.
Additionally, run a continuous ping to a website (e.g., ping cisco.com
-t) to monitor network quality, including packet loss and response time.
