Wireless connection to bridge network

I'm struggling with the last step to bridge two routers wirelessly.

main router is 10.0.0.1
extender router is 10.0.0.2

I have it mostly working, but I can not access LUCI if I am connected on the bridged device lan or wifi. Connected to main router, access .1 and .2 just fine. Connected to extended router, only .1 can't acces .2.

Extender is basically:
Client mode WiFi to main router.
wwan set static to 10.0.0.2
relay bridge lan and wwan
all interfaces a part of the lan group
disable dhcp and firewall

Tried setting lan interface to static ip 10.0.0.3. Can access luci same way on both .2 and .3, works on main router not on extended.

Not sure what else I've tried that is relevant, but nothing worked. Just want to access the LUCI setup while on the device.

after many reboots and factory resets, ai has finally given me the answer I needed:

Relayd blocks access to device's IP from LAN in same-subnet setup.
Limitation of relayd: proxy-based, blocks access to device's IP from LAN clients in same subnet.
Relayd asymmetry: device's IP accessible from WWAN (upstream) side, blocked from LAN (client) side.

So yeah, I can access the repeater from the WWAN side but not if I'm on the repeater's LAN/WIFI.