Sorry, my bad, I forgot that the setup script isn’t part of the default repo and is something I added in my own fork. But yeah, if there’s no systemd, it’s no use.
I can whip up a quick script that should work, I’ll test it out on my own hardware, and post it here for you sometime tomorrow.
I updated to LineageOS 22.2 yesterday. It has the option, I enabled it and it works. I’m on a Pixel 8, tho. Might have something to do with it.