The variations that you can generate in your timeline can enrich the reading and create an expectation in the reader. Maybe you already know many of these or maybe you have applied them before intuitively. Anyway, it will not hurt a little review.
Analepsis is a variation in which we return to an earlier point in our history that has already been overcome, it can be a memory or a way of revealing something that had not been said before, it can even be the same fact -already overcome by the protagonist- but seen from another perspective. This is a method in which we can solve many doubts and create many others.
Have you ever heard "a good story begins at the end"? this is what the prolepsis refers to. You reveal a fact that has not yet happened in your timeline and you hook the reader to the question: How did this happen? Do not exaggerate, if your advancement is too revealing, you may simply ruin the surprise.
The ellipsis, on the other hand, is a leap in time, why describe the tedious and boring years in the institute if nothing interesting happened in them? Thanks to the magic of literature, we can take the character from childhood to adulthood, without getting into adolescence. The interval doesn't have to be so long, in fact, this is one of the most used resources taking into account the classic "the next morning". We simply omit unimportant details and turn the page. It also serves to hide information that can cause intrigue, for example, we end a chapter with a "-we have to talk" and we start the next one with "the next morning".
Now if you want to skip everything that happened in a day, a year, a hundred years or more, without omitting important facts then do a summary. With the summary, you can compress everything that is very long to tell, the war of 2000 years ago, the routine of the day, as you lost all afternoon in Inkspired. It is a little-detailed way of summarizing the reader something tedious.
With the silepsis or acronía your timeline will move a bit, it is about telling a story from two timelines at different times. That is, it does not refer exactly to narrating two different stories in the same writing, but the reader has to see how those two temporal lines are connected throughout the story. Fairly suitable for a time travel story, don't you think?
Finally, the uchronía, the greatest illusion of literature, is the classic "what would have happened if...?" Well, this is not so easy in a fictional world. First, it is necessary that the Reader knows where he is and everything about the story, just then you can tell what would have happened if things had been different. It is easier to write it from our own reality, for example: What would the world be like if the Nazis had won? So we could easily have a dystopia today.
Now you can give yourself the task of making some variations on your timeline or even staging stories as a writing exercise to handle them perfectly. Take advantage of it.