oh man i have so many... so off the top of my head, a more recent one! time (is never time at all) by saru. i love the time loop concept, it plays well with the canon compliance and they're one of my favourite minsung writers - always solid characterization and beautifully done. i love how we get to put the pieces of each "loop" together as jisung does, and it's just so well written with a lovely ending. i'm a sucker for a good "us in every universe"
trope. (yes i love jayvik) https://archiveofourown.org/works/64992397