Like when they dream they are somehow tapping into another reality and seeing lives play out, the they are reframing and writing it as stories to sell.

Some examples of series that made me feel this way are the Realm of the Elderlings, gentleman bastards, red rising and the Kingkiller Chronicles (tho this one is framed that way on purpose kind of with the unreliable narrator and book within a book vibe)

Sometimes series will give me this vibe for the first book or two but then lose it, as if they no longer dream of that reality and are now just making stuff up without real context. Lightbringer and the warded man series felt like that.