How to set child to fill dynamically-sized parent's width

I'm working on a design (picture below) where a container's width is dynamically set by the text content it contains. While I can get the text container to fill just fine, I'm struggling to find a suitable solution for the LinearProgressIndicator that appears below it. I need the Column sibling to fill to the width of the parent Container yet all of my approaches have come up short.

 return Container(      padding: const EdgeInsets.all(16.0),      decoration: BoxDecoration(        borderRadius: BorderRadius.circular(8),        color: Colors.white,      ),      child: Column(        children: [          Row(            children: [              Icon(                widget.icon,                size: 48,              ),              const SizedBox(width: 14),              Text(                widget.name,                style: const TextStyle(                  fontSize: 32.0,                  fontWeight: FontWeight.bold,                ),              ),            ],          ),          LinearProgressIndicator(            value: 0.8,            color: const Color.fromARGB(255, 108, 218, 114),            borderRadius: BorderRadius.circular(8),            minHeight: 5,          ),        ],      ),    );

I can't seem to wrap the widget with Expand or use double.infinity width since the parent wrapper has no fixed sized.

I'm curious what approaches I could use to meet the design requirement.