I initially searched for marvel shows presently in limelight. Loki -> Not available What If -> Not available The Falcon and the Winter Soldier -> Not available Wandavision -> Available
Marvel Shows are more discussed in marvel subreddits like /r/marvelstudios than individual subreddits like /r/wandavision
After sorting out by No of comments only i found out, author of the website has actually grouped them together under Marvel. So Wanda vision Discussions are shown under two places but not linked to each other.
Another one aspect the website fails to capture is the discussions going on in multiple subreddits created for the same TV Show.
For example game of Thrones had individual subreddits for each houses in the show, out of which /r/freefolk was very famous (1M+ Subscribers) and had in depth discussions going on when each episode aired.