I think this might be happening because the "Show outlines" mode is enabled. In this view, objects are only shown as outlines, which can make them look invisible.
Another possibility is that the layers are hidden in the left panel — it’s worth checking if they are visible there.
Hope it helps! 😊
Product designer @ NETWORG | Designing Model-driven Power Apps in Figma | Power Apps DesignKit (Model-driven)