To use the GUI controls in LuCI you need to install the package “luci-app-*”.
tor and snort3 do not provide a UI interface, you have to configure them with SSH.
[OpenWrt Wiki] Tor client
[OpenWrt Wiki] SNORT
Snort3 - How can I configure it? - Installing and Using OpenWrt - OpenWrt Forum
In addition, the Tor page in the GL UI will be available on the next version (4.1) of the firmware.