Not able to access local/LAN devices but can access internet

I am trying to use my xaiomi 3c router with openwrt as a wireless access point. I have did some configuration and now I am able to access the internet from it but I am not able to connect to local servers like node red, ad guard etc. What can be the issue? I am complete newbie.

reset it, and configure as in

that way it'll be completely transparent, network wise.

Isn't this a guide for wired access point? I am looking for a wireless WDS access point with local network access. Is this so?

that's not clear from your description

then try