If the Screen resolution setting is greyed out in Display page in Settings of Windows 11/10 here's what you can do to resolve the issue on your computer.

You may experience Screen Resolution problems due to incorrect display settings or corrupted drivers. Here is a guide to fixing this issue.

Find those Windows Display settings a bit confusing? This tutorial explains every single adjustment, drop-down, and toggle in the Display control panel.

Android 15 QPR1 Beta 1 hints at a new settings page that'll let you adjust the resolution and rotation of external displays.