[Lava-users] iso-installer for ubuntu 20.04

Hello everyone, I'm new to LAVA and I have some issue with 'iso-installer' for ubuntu 20.04 . As you know, in ubuntu 20.04 the preseed file would not use 'debian_installer' and use 'subiquity' instead, Also LAVA does not support 'subiquity' for 'iso-installer', so I don't know how can I use 'iso-installer' for testing my ubuntu 20.04.