@pixelcode You need to edit the metadata files: https://gitlab.com/fdroid/fdroiddata/-/tree/master/metadata . Here is the structure explained: https://f-droid.org/de/docs/Build_Metadata_Reference/ and here the different AntiFeatures: https://f-droid.org/de/docs/Anti-Features/

To custom messages I do not know how they work, or where there is a docu, if there is already one.