I’m not sure what 3 movies you’re referring… you kept your posts rather vague.
As for “The French Dispatch”… same as with Glasshouse there appear to be release dates in 2022 for some regions.
There’s the various filters inside Plex to start with (e.g. filtering your library for Duplicates, Unmatched items or sorting it by date added to figure out if there’s some items that don’t seem to belong there.
Beyond that, there’s WebTools-NG
