Font awesome icons are not showing inside widget

[fobf]

body: Column(
children: [
Expanded(
child: Row(
children: [
Expanded(
child: ReusableCard(

                color: activeCardColor,
                cardChild: Column(
                  
                 
                  children: [
                    FaIcon(FontAwesomeIcons.search, size: 80),

                 
                  
                  ],
                ),
              ),
            ),
            Expanded(
              child: ReusableCard(
                color: activeCardColor,
              ),
            ),
          ],
        ),
      ),

this is the imputpage.dart, but it's not working this way, , but why not?