This requires dislocker and I uesd gparted to determine which partition needs to be decrypted
sudo apt install dislocker
sudo apt install gpartedsudo mkdir -p /media/bitlocker
sudo mkdir -p /media/bitlockermountIn gparted it will be labeled “bitlocker”
sudo dislocker <partition> -u<password> -- /media/bitlocker
sudo mount -o loop /media/bitlocker/dislocker-file /media/bitlockermountsudo umount /media/bitlockermount/
sudo umount /media/bitlockerhttps://www.linuxuprising.com/2019/04/how-to-mount-bitlocker-encrypted.html