That's kind of stretching it. It's not necessarily needed for them to explicitly talk about something from the past, unless it actually is essential for the story they're telling in the present. For example, Doctor Strange isn't going to talk about how he defeated Dormammu or became a sorcerer or point out any specific events from his movie in, say, Infinity War, because that just wouldn't make sense. This doesn't mean Doctor Strange (the movie) is not canon, nor was it ever thought to be non-canon. But his actions in Infinity War were indeed talked about in the Multiverse of Madness, where it did make sense.
So similarly, Daredevil in She-Hulk only referenced things from his own life that needed to be told for that story, for that episode. When it makes sense for him to talk about other things about himself and his past in other shows or movies, he will. It's just as simple as that, and in no way does it mean that his show is non-canon. I mean, are we going to consider Doctor Strange as non-canon simply because the events of that movie were never referenced in detail and only, as you quite eloquently put it, allusions of connection were seen?
