Directed Broadcast

We're building a new network and need to support directed broadcast messages. Essentially, some broadcast traffic shall need to be forwarded between different network segments.

From my research, I believe our FortiGate firewalls will support the forwarding of this broadcast traffic through the configuration of a multicast policy.

However, we will also be using FortiSwitch network switches. My question is, will the FortiSwitches support the forwarding of this broadcast traffic when managed through FortiOS via Fortilink? I have provided an example diagram below to illustrate, broadcast traffic from Host A must be able to reach Host B.

Thanks :)