Dialogs, Circular progress Indicator is showing only left side of screen in Folding Device. Samsung Z fold 4

Question

Dialogs and progress indicators are showing on left side of folding devices not in center.

How can I show progress indicators and Dialogs UI in center of Display in Folding Phones. Example- Samsung Z fold 4.

I uses showDialog

showDialog(
      context: context,

and dialog is showing on left side only in Folding Phones.