In Ubuntu 26.04 using wayland, when a desktop entry is created for Ratty it shows up as an unknown app in the dock.

bevyengine/bevy#7650 adds:

Add name field to bevy::window::Window. Specifying this field adds different properties to the window: application ID on Wayland, WM_CLASS on X11, or window class name on Windows. It has no effect on other platforms.

With this change the app_id is set to "Ratty" and with the following desktop entry the name and icon now work correctly:

[Desktop Entry]
Type=Application
Name=Ratty
Exec=<path to ratty binary>
Categories=Terminal;Emulator;
Keywords=ratty;terminal;emulator
Icon=<icon under ~/.icons>