when you send the btc, there is an option for changing transaction fees, depending on how fast you want your btc back.
As in you can change the confirmation of receiving time target by changing the BTC/kvB or custom BTC/kb speed; you can change the amount from 2 blocks (20 minute send) up to 1008 blocks (7 day send) with the lowest transfer fee, but at a risk of losing coins if the amount of blocks mined are too low. im assuming bohemia is withdrawing all coin at the lowest transfer fee considering it is tons of btc, which will take days/weeks to mine and release funds. hell, if they chose the slowest amount of speed of bitcoin withdrawal, a decent amount of those funds will disappear just from the timing alone being so long and risking more losses by the day. fast withdrawal methods are also probably fucking up their system too, making it hard for them. but who knows if it's an exit scam or real. i would pull out asap.
monero withdrawals have been the biggest issue, and there are definitely more people with stuck btc than xmr for the general pop. this was the only way i could find to somehow recover btc, have no idea about xmr blockchain and recovery.