Figma UI3 Update: Adjusting to Changes in Layer Panel and Variable Mode Access
The latest Figma design update has renamed the Layer section, affecting tutorials on creating light/dark mode toggles. The new path is Appearance > Apply variable mode (first icon). Users are advised to adapt to these changes for optimal functionality.

Source: https://dev.to/wceolin/wheres-the-layer-panelvariable-mode-in-figma-ui3-1ho0