Obviously Samsung's own features such as Samsung Pay, KNOX, Theme Center, Game Launcher, etc. won't be ported to LineageOS. We may have our own implementation to similar functions, though.
Iris sensor does not work because AOSP upstream does not support that yet.
IMS services (VoLTE, VoWiFi, etc). Samsung has their own proprietary implementation. It is not really possible to easily port that to LineageOS .
Sorry for noob question, but I really would like to try out linageos on my note9, I have always been a huge fan of LOS and usually I have a device with official support, when I saw this I thought great I will try it however I have no idea what this means. Pls halp?
"you are on the CSA2 based vendor and fw"