As to xposed support take a look at this post, ther3 is a moddedbxposed framework v87.1 that is supposed to work, at least mine worked on 7.9.15 for Kate.
Edit: forgot the link https://forum.xda-developers.com/showpost.php?p=73880521&postcount=909
Inviato dal mio Redmi Note 3 utilizzando Tapatalk