If you don't have "interests" that is in its way a separate question, and it is one that is worth addressing on its own.
It is shockingly common, in the modern world, to have only a job and watching-TV-while-doomscrolling-exhausted.
But it is worth thinking about. Beyond planned activities, beyond hobbies: what appeals to you at all?
Another way to look at it is outwards: what things do I know how to do that could be socially valuable and need an outlet? Like, do you know how to use a 3D printer, do you still vaguely remember how to play a musical instrument from childhood, do you find gardening easy?
That's just life, I guess.