I am surprised all banks are not the same - they are aren't they? I have KBank accounts and if there are large numbers of transactions they skip listing them all in the book (this is when an IO needs a statement), but they are combined into one large withdraw or deposit entry and so the bank ledger is thus continuous and there are never any 'holes' and the balance always carries forward.
However in the case of @roobaa01 above that you started this on, where he has listed all the book entries, how can there be missing data or risk of balance below 400k unless the bank book printing machine is malfunctioning?