Fanfiction.net is also a good place to look. There are numerous fan - created stories, including those about Thoma and Ayato. However, the interface might be a bit more dated compared to AO3, but it still has a great selection.
A really engaging 'thoma x ayato fanfic' is 'In the Shadows of Duty'. This one focuses on the more personal side of their relationship. It shows how, despite their busy schedules and important duties, they still find time for each other. It's a slow - burn type of story that gradually builds up their connection, making it very heart - warming.
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.