I’m just thinking that the name is an invitation for Big Entertainment (in particular, LucasFilm, owned by Disney) to sue for trademark infringement since they have a trademark on “droid” (I remember seeing billboards for Android phones sold under the name “droid” back around 2010ish that had footnotes acknowledging the trademark and the licensed use of the term).
It would not surprise me if Disney lawyers simply have never heard of F-Droid. Given that they were willing to go after the image of Spider-man on some deceased boy's grave stone, it would not surprise me if they at least demanded some disambiguating language from F-Droid, that is if they don't outright ask them to cease and desist. Hopefully they realize it isn't worth their time.