I started making use of collections for my anime to group the separately-listed seasons into one entry in my library. However, I noticed collections do not have played/unplayed tracking like other entries. Ideally collections would bubble up the unread count for all the items they contain.

Show unread count for collections

Topic		Replies	Views
Unwatched badge count for collections Feature Suggestions	3	220	August 8, 2021
Watched/Played status for collections Feature Suggestions	8	240	October 18, 2024
Watched/unwatched filter for collections would be nice Feature Suggestions	1	140	August 8, 2021
Movie Collections not showing with 'Unplayed' filter Feature Suggestions plex-web	4	162	December 6, 2023
Collections disappear - With unplayed filter applied Plex Media Server server-windows	5	102	November 6, 2023