It is written very clear in the FCOM: on single channel app the flare feature IS NOT AVAILABLE. It's real,no joke.
It will smash into the rwy with less than 600'/min,but no flare .Maybe some ground efect,but not a nice landing.
I think that if this would've been possible,Boeing would've said something like....autoland on SE is not permitted,recommended,authorized...not unavailable
The sim it's ALMOST like the plane,it's not programmed to do all the things like the real plane,if they are not to be expected.
I.e. try a loop ,or a barrel,it will be easy to do.Just like a FS on pc. I wouldn't try it on a real 737 though,suspect it to be harder,not like the sim...
Brgds...
Alex