Sometimes you really shake your head at the naivety and world-weariness of some people. It is absolutely common to put the customer on the spot and say, "Please order or we have to put you in somewhere when there is a slot again. But that could take a while..."
At the moment it is somewhat "better," but there were times when my colleagues and I had a lead time of 3-4 months.
For me personally, the posts of a user who just the day before yesterday was totally depressed canceling a house construction contract and now advises another user to start a multi-year legal dispute over a 20,000 EUR surcharge have a particularly unpleasant taste here. Marriages, families, yes, livelihoods have already been destroyed over things like this; compared to that, the grief over the "wrong" house is nothing at all.
If you want a house, then sign, you have no other choice. The clauses in the contract should have been checked before signing, now it's too late. And if the builder threatens you with price increases after just 2 months of delivery delay, then he will hardly let you out of the contract for free. Unfortunately, that's how it is.