What is the name of the person who is behind the setting of the game, and what is the way to form this specialist?

Question

Game development

Hello dear. Thank you in advance for answering the questions:
1) What is the name of the person who is busy with the foundation of any game: the setting?
I know that the game writer is responsible for the setting, he also writes the script for the game, deals with the plot, the characters. But such specialists are hired by large companies for AAA games.
And how are things going with a medium-sized company, which, for example, plans to create a service game in which the narrative will be presented in the form of a meager lore. Who will be responsible for the setting in such a game?
There are also people who are game designers, screenwriters, producers and development managers at the same time.
2) And, finally, what is the path of these specialists in all three cases I have cited? Where to start? How to get through?

Answer 1

There is no such person. This decision is influenced by producers, game designers, narrative designers, writers, maybe even product owners.
And you can start with game design.

Answer 2

You can view existing vacancies and requirements for them, for example:
https://www.indeed.com/viewjob?jk=69cec2fbc49a6b50...

Answer 3

Well game designers.
Again, it could be multiple people sharing the same responsibilities, or multiple people doing different things. One does the general area and ENT, the other does the main story and quests.