Interest-free availability period in the loan agreement

Hello everyone,
we received the loan agreement for our house construction yesterday. The loan agreement does not mention the offered 12 months interest-free provision period anywhere; it only states that after 12 months, X% provision interest must be paid on the loan amount not yet drawn. Is this standard?
And second question: Is it practically conceivable that the bank transfers the entire loan amount immediately and thus the normal loan interest accrues? I also cannot find a specific regulation about this in the contract.
We will go through the contract with our financial advisor next week, I just want to be prepared.
Thanks to you all.

This usually goes even further. My developer had the house price "blocked" with the bank. That means the money is transferred directly from the bank to the developer's account via a drawdown, I don't get the money in my hands at all.

And you have no control over it at all? If the BT thinks he has done everything, is payment just made? For me, it works like this: I send the invoice for the installment and a payment order by email to the Sparkasse, and they then pay out.

Just for the sake of completeness: As soon as you draw partial amounts from the loan amount, you have to pay interest on those amounts. Even within the 12 months. Many people forget that and think they only have to pay money to the bank after the 12 months.