Well, in a 'girl with equivalent exchange fanfiction', it could involve a female character within the context of the concept of equivalent exchange. Maybe she has to give something up to gain something else, like in the original concept where there's a balance in exchanges. For example, she might sacrifice her time or a personal item in exchange for a special power or knowledge.
One possible theme is sacrifice. Since equivalent exchange often involves giving up one thing for another, the girl in the fanfiction may have to make sacrifices that test her values.
As of now, the Genshin manga is not finished. The story is still evolving and there's more to come for fans to enjoy. The creators are taking their time to develop a rich and engaging narrative.
There's no definite answer yet. It might continue if there's enough demand and the creative team has more story to tell. But it could also stop if they feel they've completed the story arc.
There is a Genshin Impact manga available. It brings the game's world to life on the page with beautiful art and engaging storylines. It's a great companion to the game.