Dividing plant root systems is like major surgery. It is traumatic and if not done very carefully and properly it often has disastrous results. It is not something I usually recommend, especially with larger plants. The drooping of the Lyrata leaves indicates that the roots are not absorbing water for the plant. That may be temporary, but I would be concerned that the plants may not recover and if they do, they will most likely lose many of their lower leaves.
There is nothing that you can now add to the soil that will undo the damage already done. Recovery will depend on how well you did the division and repotting, your providing lots of good indoor sunlight and watering very carefully. None of the various products mentioned above will help the roots recover the ability to properly absorb water and nutrients. There are no shortcuts, so be patient and think carefully before attempting root division in the future.
