HowTo? Non-AP access to printer on WiFi SSID from WAN

Do you mind opening your BE9300 LAN to the BE9300 WAN (ie to primary router)?

If you evaluate the 10.x.x.x (primary router) is secure and on your control, you can change the forward of WAN -> LAN to accept in BE9300, and then add a new route manually in the primary router, the target is 192.168.8.0/24, and the gateway is your BE9300 WAN IP.

Available for reference: