On mobile you can’t read reddit comment threads unless you install their official app. I hate that Google surfaces reddit threads since the site itself often doesn’t contain the information indexed by the search.
Check the settings of your Reddit client app. I set mine to open links from reddit.com and old.reddit.com. So when I click on a search result, it pulls up the page in the app.
Oh great - I didn't realise Apollo could open reddit links on mobile! Fantastic - for the remaining days while apollo works at all. Sigh.
That's not true, for me at least. I use mobile browser reddit and can see comment threads just fine.