Yes, we can change the stacking order in mobile by using direction. Could you please share the coding or screenshot so that I can let you know how exactly you can do the same?
I am understanding your concern, actually you have to apply Dir in the columns to reverse them.
In the mobile left column always comes at the top position, so you have to create your 2-Col section as per the mobile layout means which section you want to keep at the top in the mobile you have to keep that section on the left side and using this direction property you can manage your desktop layout, please refer to the attached screenshot.
If this is not clear you can share your code with me, I will add the dir property in your code.