Maybe because they have more fans (▰˘◡˘▰) Misssoraaa___
One of the reasons they do is because we’ve gotten to fall in love with their love story and obviously attraction to each other. I think the same could happen for Jian Yi and Xi if Old Xian would give their relationship more romantic/sensual development
I truly feel that old Xian favor Mo and He Tian because they get all the couple romance tropes and are depicted with constant physical intimacy.
Not saying all couple are touchy feely but we’ve haven’t even gotten a real kiss or moment of mutual non-platonic intimacy between Jian Yi and Xi