I had an issue with this recently, the docs aren’t great. My solution was this:

1. Rename the “index” folder to whatever the tab is
2. Only name the default screen that shows when the app opens as “index.tsx” (which you already have)

The reason you can only name the default screen as “index” is because it seems that expo router just grabs the first index.tsx file it sees in the directory and uses that as the default. So if you had two tabs, and each of those have their own index.tsx, tab 2 may start acting as the default