Can’t select LUKS partition in the installer

Hello, I wanted to install Kubuntu with FDE with a custom cryptsetup parameters, so I created two partitions on the sda, sda1 with ext4 (boot) and sda2 which is LUKS partition, after that, I opened LUKS partition and launched the installer, but it only shows sda1 and sda2 but not a mapper for sda2, so the question is, is it possible to somehow install Kubuntu on an already existing LUKS partition? I’ve tried naming the mapper to live-* and luks-UUID but that didn’t work.