Feyre was immediately attracted to Rhys when she met him on Calanmai.
Nesta ‘had loved Cassian’ from the moment she met him.
Elain… felt nothing when she met Lucien. She didn’t find him attractive, she wasn’t drawn to him, she didn’t care for him.
But she was drawn to Azriel.
@Jen_Arias01
Elain herself says, to Graysen in ACOWAR, that she feels nothing for Lucien and doesn’t want him.
So yeah, we have had her feelings shown to us.