@Tony Thank you your reply, so do you mean i need change the topology ? how about if i changed like below, is this working ? can i change the topology like above, all devices in the same network...

@Tony There is no another vlan, i cannot see TPlink Archer V6 support for create Vlan, if this support i will create vlan for guest and create gateway for each wifi (Staff and Guest) in the firewall...

I Have 2 SSID, Guest Wifi and Staff Wifi, in same network 192.168.10.0/24, i have problem why Guest user still can access Staff wifi, even Guest wifi setting already unchecked like picture below....