SDWAN Rules

Did you try with policy route?

You can use SD-WAN rules to forward the traffic to specific destination.

Take a look at this article this might help https://docs.fortinet.com/document/fortigate/7.6.0/administration-guide/413288/sd-wan-rules-overview

You can use ISDB on SDWAN rule. We have ISDB for Google.

I added the following policy route, but it doesn't seem to be working correctly. Additionally, the SD-WAN rule cannot forward traffic to a specific IP address.

config router policy
edit 1
set gateway 192.168.110.50
set status disable
set internet-service-id 65539 65543 65646 65545 65544 65536 65540 65542 65537
next
end

I forwarded traffic from certain websites to the IP 110.50, but there is no traffic received on the 50.

this 110.50 is a router

Yes, it's on the same subnet under the same interface.