I got you! Epic adventure Zelda fics are my absolute jam, but honestly, finding ones that truly nail the grand journey feel of the games can be tough. A lot of authors get stuck retelling the game plots beat-for-beat. The stories that work for me are the ones that feel like a new game entirely.
'Legends of a Dragonfly' over on Ao3 is a monster of a longfic, but it's stuck with me. It starts post-Breath of the Wild but goes in a wild direction with Zonai lore, a new continent, and a threat that forces Link and Zelda to work with an uneasy alliance of Gerudo, Rito, and even Lynels. The author builds a whole new set of ruins to explore, which hits that 'epic discovery' note perfectly.
Another one, 'Shadow and Silver', crosses over with 'The Legend of Dragoon' of all things, but it's less about the crossover and more about using that world's magic system to explore what happens when the Triforce isn't the only source of divine power. It gets weird and cosmic, but the trek across a corrupted Hyrule Field felt genuinely tense and dangerous, like the best parts of 'Twilight Princess'.
If you're willing to look outside Ao3, some of the old 'Hyrule Warriors' era fics on FFN had a real pulpy, swashbuckling energy. Lots of dimensional hopping and army battles.
Finding the good stuff is always a gamble, but those two I mentioned are a solid start.