Super bowl trade issue

I’ve got the same issue with now eight iconic players and one mythic player who are all sitting on the bench. I don’t want to play them because I have better, but I can’t trade them for development points because they don’t show up in the window when I try. Frustrating. Reported the issue a month ago and tech support (after jumping me through some hoops) just shrugged and said to bring the problem here. It’s been here and nothing but other users with the same issue. iOS on an iPhone