https://smashmockup.com/modern-flat-website-presentation-mockup/

Minimal flat and modern website page presentation mockup; PSD flat graphic template photoshop featuring smart object layer editing. Backgrounds, colors and other effects are easily customizable.

This fully layered PSD file allows you to show off your design. The PSD file allows you to change all elements and come with many customization options. Completely layered file with smart object.