Managed to get it to boot, looks like it has problems with configurations, copied the partition lines from kernel/sony/msm8994/arch/arm64/configs/kitakami_karin_defconfig to kernel/sony/msm8994/arch/arm64/configs/kitakami_karin_windy_defconfig it boots into ssh now, but still no screen or anything, anyway it's progress.

I had the same issue on my SGP771 device no matter which version of UBports Installer I have tried and which settings I have chosen. After not being able to find any clue I have installed Ubuntu 22.04 on my old desktop and went through these steps to install UT without the installer: Flashed my device with Android 7 using Flashtool. Downloaded system.img, halium-boot.img (old) and TWRP-3.1.1-lineageos-karin-20170520.img using links from Guf's porting page. Installed custom recovery TWRP-3.1.1-lineageos-karin-20170520.img on the device using these instructions. Installed system.img and rootfs with halium-install + flashed halium-boot.img as described here. I ran those two blocks of code on Guf's porting page in TWRP command line (under “Important note for UT rootfs to work”). I am a newbie in this area and not sure if that is all correct but UT is running, except for the camera and bluetooth, I didn’t figure out yet how to enable them.

@z4tab Glad to see it and thanks for the help so far. I was referring to yamanobe, the original poster that may or may not have fixed their issue.