Hi!!!
It is horrible.
For their whole lives those children will be not only mispronounced and teased but also confused.
I can imagine Xale's classmates saying 'oh, this is your brother Xeal" and she/him "no, it's my sister
Lexa. And Xeal is actually a 'she' too". What a mess.
All these names are also genderless.
Personal Name Lists
https://www.behindthename.com/pnl/125456