Hello,
There is usually an exterior and interior side for window families.
If I were you, I would:
1. Open the window family
2. In the family, Go to a plan view - Ref. Level.
In this view, the top half from the "Centre" reference line is usually the exterior side, and the bottom is the interior side.
3. Look for where the "Flip" arrow has been placed. Is it on the exterior side or the interior side? (Move it if you want to)
The location of the "Flip" arrow will help you determine which windows are in the wrong side in your Revit file.
4. Reload this family into your project if you changed anything.
5. Click on your windows (one by one) and see if the "Flip" arrow is showing up on the proper side (Exterior or Interior)
In the image attached, it is showing where the Floor Plan - Ref. Level can be found, the Exterior and Interior side of the window, and also the "Flip" Arrow
EDIT: If the glass is clearly on the exterior or interior side, you can use this as a reference instead of the "Flip" arrow.