see below, I have nearly 100 GB of used space in cloud for messages. It says I have 2.74 GB of top conversations which cannot be accurate over seven years of collective text. Some of which are with people where I’ve got probably 20 GB of conversation. Further, when I select the top conversations, it gives me a blank screen so my information summary is seemingly inaccurate and incomplete. Yours might be displaying errors that are not representative of actual data use
you can call 1-800-myApple and asked for technical support for your device where they can even screen share and potentially help. I have a mixture of results through Apple Support over countless cases. But they may be able to explain and help rectify. Be careful some of the suggestions by advisors can be extreme, which caused other problems like, reset all settings on device. Generally fixes very little, but sometimes broadly stated and shouldn’t be a first action taken without extreme care. That type of setting to try and resolve some smaller issue set you back to default settings for whether or not to keep audio messages and text forever in which apps are cloud synced, and which apps have which permissions, etc., etc.
Anyway, see my screen capture with similar inaccuracies of top conversations being very small relative to my overall data usage and then tapping on top conversations and having nothing appear. There may be a bug in this software version. It may be by calling they reveal that to you and it’s going to be fixed. Not sure but I am encountering similar problem.
. having trouble getting these pictures to show up, logically on phone interface.