In Mushoku Tensei, Rudy learn of future events from his future self traveling back in time using all his MP to give Rudy the journal from the future, entailing things to come.
This let Rudeus avoid various bad events and change the future of him losing everyone he loved.
(and Orsted himself has been through the time loop so many times he's seen...well, alternate endings for other people in Rudeus's life, like who Eris would've married if she didn't meet Rudeus)
In Ascendance of Bookworm, in the post-story, one character was involved in the Gods' attempt to call out to Myne (they can't do it directly because Mr. Jealous Husband put up quite the barrier to prevent them from doing so)
As a result she get to watch a Goddess basically send Myne back in history to ensure Ferdinand's survival, and this give explanation to one of the minor mystery in the main story (Ferdinand's dad saved him apparently 'under the Goddess's order')