Hello,
What I assume has happened, is that you have kept updating firmware with Keep settings option enabled from some legacy WebUI version. Legacy versions had a number of preconfigured zones, which would transfer to the next firmware, if update was performed with keeping the configuration.
The new firmware versions (7.0x and above) have only two default zones: LAN and WAN, as these are mandatory for the device to forward internet traffic and apply firewalling.
Additional zones are either created automatically, after configuring some VPN or hotspot, or can be added manually, depending on your network segmentation requirements.
You can find more details about inter-zone traffic forwarding from this configuration example.
Best regards,