Use the Wallpaper Engine app to automatically scale images across monitors with different resolutions. Select your monitor in the app, click Group , and then select Stretch .
Go to Settings > Personalization > Background . Choose your image, then under the "Choose a fit" dropdown, select Span . 1422x1600 Vertical Dual Monitor Wallpaper – 142...
For setups where monitors don't align perfectly (e.g., different physical sizes), DisplayFusion provides features like offsets to account for monitor bezels and zoom adjustments. Use the Wallpaper Engine app to automatically scale
How to align wallpapers when using multi monitors in Wallpaper Engine different physical sizes)