Questions about multi-layer routing ing to Intranet servers

For more information, see Linux Enterprise Application-Linux server application. My network environment is like this:
Internet -- router A -- router B -- Server

The specific network parameters are:
The Internet has a fixed public IP.
Router A: WLAN: fixed public IP address; LAN: 192.168.1.1
Vrob B: WLAN: 192.168.1.2; LAN: 192.168.2.1; open DMZ to the server on the layer
Server: 192.168.2.2

I have set up a peanut shell on vrob B. I have successfully logged on, and a PC with a network segment 1 can PING the free peanut shell domain name. However, I cannot access the server homepage by entering the free peanut shell domain name in a browser.
Do you need to set A ing on vroa A and map it to vrob B?