This is the insurance from the developer. We are not allowed to provide any information. And I can’t reach the developer. It takes too long for me.
They are not allowed to give you any information? Then you’re probably not insured there ^^
You can really take out a building insurance anywhere and there is no waiting period. Choose a reasonable one, new builds are relatively cheap. If you need it, they should also pay. And if possible, get one with elemental coverage (flooding etc...) ^^