Here’s an example with a missing icon. We can manually apply a new icon from a bookmarked or “Saved” icon.
Open a Nate Wren Design Icon Pack
Browse the “Icons” tab. I’m searching for a new file icon in this example.
When you tap on a single icon, you now have this star icon in the top right. Tapping this will add the icon to your “Saved” section.
Here’s our file icon in our “Saved” section.
Now we can go back to the home screen and long-press the icon we want to manually edit or change.
Tap the icon in the “Edit Icon” popup. I’m using Nova Launcher for this example. Most other launchers have similar settings.
Select the icon pack with your saved icon.
In the top right, there’s an arrow button. Tap this to use the icon pack’s icon picker instead of the launcher’s icon picker.
Choose your icon from the “saved” section.
You’ll notice the icon has been updated in the “Edit Icon” popup. Tap “Done” to close the prompt.
That’s it! The icon is now updated on the home screen.