Tony finding out that Steve and co are hiding out in Wakanda and at first he's not sure what to do but when he hears that Bucky's been frozen again he sends T'Challa the blue prints for his memory glasses...
I consider this to be canon. Why else would they have shown the glasses in the first place.
And I bet it doesn’t even need any prompting at all. Tony learnes that they are in Wakanda, and T’Challa of course knows about the glasses, and he was leading up to ask for them. He doesn’t want to ask too directly because he understands that Tony has every right to be mad at Steve, but one day suddenly the glasses arrive, with a detailed description about how the glasses work.
Along with the burner phone because fuck Steve if he thinks Tony is going to call him.