Audible’s just going off what you have previously bought and/or clicked on. The algorithm won’t change until you start looking and buying other types of books.

So you’re looking for higher stakes but not overly serious in tone, like still with adult themes but with teenage MCs? Dystopian future, no ‘woke’ subject matter? Good worldbuilding, wilful lead?…try Mark Lawrence’s trilogies starting with The Broken Empire trilogy and if you like that, the rest of his trilogies.