Let's talk about .well-known/apple-app-site-association. Are you sure you need an empty apps array? What about paths, did you remember to duplicate it to the components array?

If you're new to iOS development like I am, you know how hard it is to know if you're configuring this file right. Are wildcards allowed? Why is this property here? Should I host this in each subdomain?

Misconfiguring the AASA can cause your app's handling of universal links to behave inconsistently. Turns out, there is a right way to do it, it's just not very well documented.

https://forums.developer.apple.com/forums/thread/129460

I can tell you my team's AASA file had some deprecated attributes. Check the video out and compare it to your current association file.