I noticed that the AASA file is not downloaded (by monitoring the API calls in Charles) on iOS 13.1. I was going through the WWDC https://developer.apple.com/videos/play/wwdc2019/717/ video, but could not find any hint whether we need an additional step on iOS 13.
Anyone experienced the same problem? It works on iOS 12.2 and earlier.
On
You can check in your console for error if any during file download on first installation https://ios13.dev/universal-links-debugging-on-ios-13-cjwsux93w001p6ws1swtstmzc
And if you want to validate JSON format
https://branch.io/resources/aasa-validator/
i was facing this same issue. I found that was charles root certificate the cause of the AASA file not being downloaded. After I removed it from my device, AASA file was downloaded again and universal links worked fine.