Reddit links open in the Reddit app no matter what's chosen in the App Opener.
If I search for this string:
"Can I eat Sabra Hummus a week after the best by date?? "
And find this link:
""
Clicking it opens the reddit app (while pasting it directly into the url field opens it in Orion).
Tapping it immediately opens the Reddit app. Swiping back to Orion I am greeted by the App Opener dialogue box  me if I want to open the link in Reddit, Apollo, Other App..., or Orion. The "Remember My Choice" toggle is enabled. When I tap Other App, Apollo and Narwhal are selected. Reddit is not. Narwhal Is indicated as the "primary handler for all Reddit links". Deselecting Apollo doesn't stick and it is reselected next time I repeat this process.
Since all links that look like reddit links (including "reddit.com" and "www.reddit.com" say Narwhal as the associated app in the "UNIVERSAL LINKS" section of settings, it should open in Narwhal but does not. Everything stated here is occurs identically on my iPad and iPhone.
1.3.24
18