Pandomo turns yellowish and wavy after sealing

Have you looked at this somewhere before?
What does it cost per m²?

Yes, of course in the showroom. The floor costs about €150 per m2

The ground is already uneven without sealing (Bild1).

So today I just stepped on the floor and it not only looks wavy, it also has dents in 4-5 spots! I have now also looked at the children's rooms and the bedroom and somehow the color and texture vary from room to room!

The waves were already there according to the first pictures. Who was responsible for preparing the substrate?

The mass is self-leveling, as one user already mentioned, but the effect depends on the layer thickness and the substrate. How thick should it be applied? The waves in the kitchen/dining room (? - first picture) look quite significant.

P.S.: Does it only look like that, or is the staircase very steep?

I can understand you well. The color looks really terrible..... somehow like urine yellow...