I'm into 2019/20, and i can honestly say that none of the youngsters ive bought have ever fullfilled their maximum potential. Most become "quality players" or "good players". i havent had a "key member" or "one of the best" in my team.
Are your two strikers regens or actual players out of interest? always on the lookout for new players
how would you know what their maximum potential was anyway? unless you cheated...