The draft document has been made available to creditors but it says not to share with the public. But it does say that BTC and BCH claims will be valued at the BTC/BCH-to-yen conversion rate as of the time of commencement of rehabilitation proceedings (749,318.83 yen/BTC). And the payout will be less than that because the remaining assets will be distributed to creditors in a prorated system (although certain small fiat claims and possibly other claims may have higher priority).
There is definitely not a specific amount of BTC currently that would be paid to creditors per BTC that they held, since it depends on the final total claims (which is mostly finalized but may still change a bit), and presumably on the value of the remaining BTC/BCH assets held by the trustee at the time of distribution.
One creditor made a calculator to compute the payout based on the current exchange rates and such: https://old.reddit.com/r/mtgoxinsolvency/comments/l08ymh/mt_...
Only in January 2021 did CoinLab finally say, okay, we will agree that the distribution of 90% of the assets can start while our lawsuit continues (they are ridiculously demanding that CoinLab get some big portion of the other 10%, so they want that money held up until their absurd lawsuit is finally thrown out). See https://www.bloomberg.com/news/articles/2021-01-15/coinlab-r...