Some flooring such as solid wood or engineered wood can bridge small depressions.
How to fix low spot under floating floor.
For quick repairs of soft spots in your laminate floor use an air inflation needle or a syringe used to blow up sports balls on a can of spray foam.
Mobile home windows also have a tendency to leak and may be allowing water to run down onto your floor where it seeps into the flooring and begins to create soft spots.
You could do this from the bottom side in your case and drill a larger hole that the straw fits through.
Attach an air inflation needle as an extension onto a can of spray foam.
If a gap appears under the center of the level it indicates a low spot if the level rocks back and.
Place the level on different areas of the floor and notice if it lays flat in all spots.
Floor leveling compound is made for just such a thing.
This should be a simple fix.
Soft spots in a laminate floor can be caused by an uneven sub floor or improper installation of flooring underlayment.
Be sure to use low expanding foam and i would also place a large heavy object on the floor above to be sure you do not push the flooring up with the foam.
Low spots and depressions in subfloor.