Congratulations on moving in! Is the floor practically directly on the screed? The vapor barrier (what for, actually?) doesn’t really play a role for the floor. Normally, at least an impact sound insulation is used. Sure, without a basement that sounds pointless at first, but it also secures the floor and should even out some unevenness. Are the baseboards already installed and glued, I assume? If it already annoys you, I would redo it room by room anyway. Either just with impact sound insulation or additionally with leveling compound beforehand. That dries quite quickly. Now the furniture can still be quickly moved out again.