The Attribute is Set to "Hidden from Customers"

If the "Attributes" tab shows the "Hidden from Customers" icon (Fig. 1), follow these steps to make the attribute visible:

1️⃣ Go to "General Attributes"

Navigate to the "Manage Attributes" section:

Path: Product → Attributes → Manage Attributes (Fig. 2)

2️⃣ Open the "General (No Type Assigned)" Tab

In Product Types, open the "General (No Type Assigned)" tab (Fig. 3).

3️⃣ Enable Attribute Display

In the Attributes block, enable the display for the necessary attributes (Fig. 4)

Fig. 4

Fig. 5

4️⃣ Save Changes

Click the "Save" button (Fig. 5)