An archived documentation article about Universal Links, https://developer.apple.com/library/archive/documentation/General/Conceptual/AppSearch/UniversalLinks.html
states:
"In your com.apple.developer.associated-domains entitlement, include a list [...], prefixed with applinks:, such as applinks:sub.mywebsite.com. Limit this list to no more than about 20 to 30 domains."
This document was updated last in 2016 and it appears to be archived since 2018.
Newer documentation, like
https://developer.apple.com/documentation/xcode/supporting-associated-domains
or
https://developer.apple.com/documentation/xcode/configuring-an-associated-domain
do not mention any limitations and since iOS 14 there is also an Apple provided CDN that apps use to fetch domain association data, which lets one think that the limit may have been lifted.
However, I'm in the process of implementing universal links and shared web credentials for a portal app with many customers, a few hundreds of them have their own domain, and would like to be sure this is supported before putting all the work into it.
So if anyone with a similar setup or someone from Apple could share/verify that there is no such limit anymore (or if any, what number) I would highly appreciate it.
Bests
bbjay
