Tailscale and Extender Network Mode

I’m trying to set up a Slate Plus (GL-A1300) as a extender to pass through my home WiFi. One of the features of that is the Web UI is unreachable, or at least it is in my case. I had installed and activated Tailscale and it worked. I also enabled Allow Remote Access WAN and Allow Remote Access LAN.

But… when I enabled Network → Network Mode → Extender I lost access to the device using TailScale IP address. I had expected it to continue working and it would give me access to the UI.

what am I doing wrong? Or is this capability missing? can it be added?