I am using macOS Sequoia. When Maximize Compatibility is OFF, Finder shows blank thumbnails for PSD files. When ON, PSD size doubles due to the embedded full-resolution composite. Please add a new save option to embed a lightweight thumbnail preview only (Finder preview) without embedding a full flattened image for compatibility. A small embedded preview image would solve Finder thumbnails without bloating PSD files.
Thank you for your time.
AZWB