Add Feature Parameters to Your Managed Package

After you’ve created some feature parameters, you can add them to a managed package as components and reference them in your code. Feature parameters aren’t available in unmanaged packages.

A package can include up to 200 feature parameters.

Complete these steps in your packaging org.

From Setup, enter Packages in the Quick Find box, then select Packages.
In the Packages section, in the Package Name column, select your managed package.
On the Components tab, click Add.
From the Component Type dropdown, select Feature Parameter Boolean, Feature Parameter Date, or Feature Parameter Integer.
Select your feature parameter, and then click Add to Package.