WiFi hotspot & Pi-hole, howto see the wlan clients

Hi everyone,
so I´ve Pi-hole running on etho and the Hotspot running on wlan0. Working beautifully, the connected wlan clients pull a dhcp from the hotspot and ads get blocked thanks to the pi-hole. Question: how can I make a pc on my ethernet “see” a wlan client? The wifi seems to be in the network and my ethernet is