I try to setup two different LANs separated from each other. LAN setup works as expected but the gateway routes between the nets. (Which is ok BUT) I see no opportunity to separate them from each other. Gateway ACL doesn't work: "Rules of Gateway ACL take effect only on the traffic which is sourced from LAN ports and forwarded to the WAN ports." Is there something I missed?

I only found this: https://www.tp-link.com/en/support/faq/3091/

But I want the separation on the gateway not switch.