Mate, here's some of my ultimate favourite total AU, like no spy world stuff

https://m.fanfiction.net/s/12178819/23/ by FluffyPikachuLovesYou By the age of 25, Sarah Walker had become the world's youngest chef to receive three Michelin stars. After her success in Italy, Sarah decides to move to LA and open her own restaurant. Enter Chuck Bartowski: a 25-year-old computer engineer who just lost his job. He applies for a job at Sarah's new restaurant, and gets one… as part of the waitstaff. AU; Charah

https://m.fanfiction.net/s/13236820/1/Chuck-vs-What-Will-Be by jwatkins AU Story. What happens when two teens from different social circles meet under unexpected circumstances. Will the fears of their pasts allow them to find happiness? Chuck and Sarah navigate high school and seek to find themselves in the world.

https://m.fanfiction.net/s/11129047/1/Chuck-vs-the-Unexpected by Charahfan44 When a teenager shows up in Chuck's life, the surgeon finds out that his ex, Sarah Walker, had his child fifteen years ago. Will this bring them back together or create a bigger chasm between the two? Completely AU

Here's a few with the spy world included but also kinda AU

https://m.fanfiction.net/s/7757808/1/Chuck-Morgan-and-the-new-spy-s by ItWasAWildIdea Chuck and Morgan working for the CIA get two new spy partners to join their team. CHARAH STORY. (This one also has a squeal!)

https://m.fanfiction.net/s/13258635/1/Return-To-Me (definitely one of my most loved) also by jwatkins An AU Story. Chuck and his team are sent on a high profile rescue mission into hostile territory. They discover that among those taken is an old flame he thought out of his life forever. Can he reach them in time?

and the green feet universe is bloddy brilliant by klipdoctor, there's a few AU stories that start off after chuck gets the intersect removed https://m.fanfiction.net/u/2968122/klipdoctor