Wlan repeater relayd

When I do a wlan repeater with relayd, i get for the clients on the repeater an IP adress from my main router. Thats OK. But has the wlan repeater a IP adress, too? Because I want to access the luci webinterface from the repeater but i dont know, what IP i should to enter?
Or is that inpossible?
EDIT: when I used the FritzOS-Wlan-Repeater function between 2 fritzboxes, the repeater has a IP adress from my main router, too.

Just use a static IP in the same subnet.

I did it, but it doesnt work. my main router is and on the repeater, I did I can ping it, but I cant access the luci interface. I did nmap, too:

Starting Nmap 7.80 ( https://nmap.org ) at 2022-07-25 07:50 CEST
Nmap scan report for
Host is up (0.0030s latency).
All 1000 scanned ports on are closed
MAC Address: 24:65:11:B8:17:8E (AVM GmbH)

Nmap done: 1 IP address (1 host up) scanned in 38.46 seconds

The repeater must have a different subnet that the main router. Nevertheless, when creating the interface, you can setup a local IPv4 address, in the same subnet that your main router.

Ok ...
My repeater is I connected to my main router with The repeater wwan interface becomes the IP from my main router. In my main router, I can see the IP Where I have to set the static IP?
The reason is, on my repeater is a USB Storage, that I want to access, too ( NFS ).

Ah, I think the WAN firewall have set to accept, accept, accept. Then I can get the access to luci on the repeater.