control the alignment of printed widget

[flutter-max]

This is my code :
Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Expanded(
child: Receipt(
backgroundColor: AppColors.white,
onInitialized: (ctr) {
controller = ctr;
},
builder: (context) => Container(
padding: EdgeInsets.symmetric(horizontal: 4.w, vertical: 48.h),
child: Column(
children: [
SizedBox(
width: 250.w,
child: QrImage(
data: jsonEncode(qrJson),
version: QrVersions.auto,
backgroundColor: AppColors.white,
),
),
SizedBox(height: 24.h),
_buildText(
isEnglish ? event.nameEn : event.nameAr,
),
SizedBox(height: 12.h),
_buildText(phoneNumber),
SizedBox(height: 12.h),
_buildText(
DateFormatter.getDDMMYYYY2(eventDay, code: code)),
SizedBox(height: 12.h),
_buildText(isEnglish
? event.locationNameEn
: event.locationNameAr),
],
),
),
),
),
],
),

the widget is printed in leftCenter of papper. how can align it in the center? , as the widget in the center of screen.
thanks

[nicosps]

try to set Center inside _buildText widget