Same. I’m moving back to android, but I will surely miss FaceID.

Universal back button

Google assistant

Google keyboard

Long screen shots

Scheduled text message. I know there a shortcut to do this on iOS, but it is far from the same.

Notifications. How apple hasn’t fixed notifications to something better is beyond me.

Call screen and Messages intercepting junk messages.

Split screen

Interactive widgets

I miss android, but the iPhone also does good things as well. I tend to think that android is a little more intuitive and easier to use because you can set it up the way you want to use it. With iOS you are caged in doing things the way apple wants you to do them. If you are ok with this, iPhone is king of the hill.