I can't change the size of images in Photoshop on Windows

Image resize should resize all layer in a document. What you posted looks like there may be  more than a single layer involved.  You can link layer that you want to resize together  and then use free transform. You can not make a selection in some layer and resize the selected area.  Smart object layers and shape layers can not  be modified like that.

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Hi there,

To change the size of an image you need to select the correct layer in the layers panel and then go to Edit > Free Transform and resize the object by holding the bounding box from any of the four corners.

Regards,
Sahil