This is actually a regression from the alternate installer. With that, you could select "Configure encrypted volumes" followed by "Activate existing encrypted volumes", enter your passphrase, and then existing encrypted volumes would become available in the partitioner.
This is actually a regression from the alternate installer. With that, you could select "Configure encrypted volumes" followed by "Activate existing encrypted volumes", enter your passphrase, and then existing encrypted volumes would become available in the partitioner.