Here’s my take on this.
Recovering deleted Snaps is a challenging task because the app is specifically designed for content to be temporary. However, there are a few avenues people explore, each with its own set of trade-offs.
Some users try to find remnants in the device’s cache. On an iPhone, this is quite difficult as the file system is locked down, and data is often overwritten quickly. It’s generally an unreliable method. A more official route is using Snapchat’s “My Data” feature to request an archive of your account, which can include chat history, but often not the visual media itself.
Then you have third-party recovery tools. While they market themselves as solutions, their effectiveness for app-specific, encrypted data like Snaps can be limited. There’s no guarantee they will work, so it’s a path to approach with managed expectations.