Please why after using Row the text "TABLEAU DE BORD"

Question

Please why after using Row the text "TABLEAU DE BORD"

is align in center?
here is my code

Column(
//mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Container(
child: Row(
children: [
const CircleAvatar(
child: Icon(Icons.person),
),
// ignore: prefer_const_constructors
SizedBox(
width: 10,
),
Text("Salut M " + userlogin,
style: GoogleFonts.inter(
fontSize: textscale * 15,
fontWeight: FontWeight.w500,
color: Colors.grey[700])),
],
),
),
const SizedBox(
height: 30,
),
Text("TABLEAU DE BORD",
style: GoogleFonts.inter(
fontSize: textscale * 25, fontWeight: FontWeight