Apple today released iOS 26.0.1 and iPadOS 26.0.1, the first updates to the iOS 26 and iPadOS 26 operating systems that came out earlier this week. The new software can be downloaded on eligible iPhones and iPads over-the-air by going to Settings > General > Software Update.
I just updated my phone and now emails take a minute to load. Like not joking at least a full 60 seconds after freshly opening the app.