OnePlus
Edit Quick Settings in the Status Bar auf OnePlus
The quick settings panel on OnePlus phones only shows a default selection of toggles. Everything else, like Flashlight, Screen Recorder or Dark Mode, sits in a hidden row until you add it manually.
To open the editor, Swipe downwards with two fingers to expand the panel, then Tap on Edit. This switches the panel into edit mode and reveals every available toggle, including the ones not currently shown.
Use Swipe left or right to browse the quick settings to see the full list of hidden icons. Tap and hold an icon to pick it up, then Drag the icon in upper area to add it to the quick settings. Release the icon to position it exactly where you want it in the visible row.
The same drag gesture works for reordering icons you already have, or for pulling one back down to remove it from the visible panel. Once the layout looks right, Tap on Back to save the changes and exit edit mode.
If a toggle is still missing after editing, it may belong to a feature that is disabled elsewhere in the system, not to the quick settings list itself.