If you don't feel at ease, you can take the car with the skylight closed, so that your family or friends can keep pouring water on the skylight on the roof to see if there is water leakage in the gap of the skylight inside the car. If not, please forget that the sealing strip has collapsed and live your car life in peace:)
If there is water leakage, go back to 4S and ask them to replace the sealing strip. (But this misfortune is really rare. )
If everything is normal, there is nothing wrong with it, and you just don't like it (mild obsessive-compulsive disorder), then you can try to heat it with a hair dryer and cooperate with your hands to "plastic" the collapsed part without being squeezed open.
Pure hand tour, hope to adopt:)