Can I repair the warping in this laminate flooring
If you mean the flooring is warped with the shape of the 2x3s from sitting on them for months, maybe you can save them by unwarping them.

First I would try setting them on a hard flat surface (like a concrete garage floor).  If sitting on some shape deformed them, the same process should reform them.  Keeping them at elevated temperature (80&ndash;110°F) should speed up the process.

If that proves unsatisfactory, perhaps setting them on the "reverse" of what they sat on before:  Create a 2x3 gap underneath where they sat on support before and with the rest of the bottom solidly supported.  The pressure is much less this way so it would take much longer to change shape than they did before.  Presumably it did not take the whole four months to warp, so with a little luck, perhaps they will reform in a matter of a few days.