ah, so xianxia has gods/goddesses/immortals/deities. there's also 妖 yao (beings cultivated from plants or animals/creatures; sometimes translated to demons, or for example, something from a plant can be called a plant spirit; will depend on the translator) and 魔 mo (sometimes translated to demons or devils; usually seen at mostly bad but can be good as well as some shows try to explain [same with yao], likewise how immortals aren't all good and have bad as well) as well.
meanwhile, wuxia is about the martial arts world (aka jianghu) and martial arts.
1 
ah, so xianxia has gods/goddesses/immortals/deities.
there's also 妖 yao (beings cultivated from plants or animals/creatures; sometimes translated to demons, or for example, something from a plant can be called a plant spirit; will depend on the translator)
and 魔 mo (sometimes translated to demons or devils; usually seen at mostly bad but can be good as well as some shows try to explain [same with yao], likewise how immortals aren't all good and have bad as well) as well.
meanwhile, wuxia is about the martial arts world (aka jianghu) and martial arts.
1) https://mydramalist.com/article/cookie-done-devitto-done-introduction-to-xianxia-dramas
2) https://mydramalist.com/article/introduction-to-wuxia-dramas
3) https://mydramalist.com/article/introduction-to-xuanhuan-dramas2#:~:text=Xuanhuan%20is%20a%20genre%20with,non%2Dexistent%20in%20Xuanhuan%20dramas.