@YuliaR - you will need to edit customer notifications and add direction: rtl; into the body tag
are you familiar with css or html code edit?
@YuliaR - you need to add it to the body tag or css of the particular notification you want to align to right. You will have notifications in notifications tab in settings.
@YuliaR - you need to go to settings->notifications then select the notification you want and in that you will have its html.
In that html you will have body tag like <body> so you can make it <body style="direction:rtl;">