Can't replicate Adobe tutorial: Adjustment layer applied to layer mask

In Photoshop 2026 there's a tutorial in the program called "Using layer masks". In it, the presenter explains how to create a layer mask on a green cup so that clouds from the image on the layer below becomes visible in the cup. Bottom layer is the clouds and above it is the layer with the teacup with the layer mask. There's a little chain icon between these two. So far so good.

The tutorial then says you can even use adjustment layers on the layer mask. The presenter has the layer mask selected in the layers panel, clicks on Adjustments and selects Hue/Saturation. When she drags the saturation slider in Properties, the color of the clouds gets more intense, but the layer with the teacup is not affected. When I do this, both the teacup layer and the cloud layer are affected. What am I doing wrong? I know I can move the adjustment layer down so it sits above the layer I want adjusted, but that's not what the tutorial showed. The screenshot is from my layers panel after having applied the adjustment layer.