That does not seem to be a good way to pay homage to the character or the actress.
A namedrop in two films is enough homage for me.
If the script had required an actress be engaged to deliver medical dialogue, you can bet Chapel would have been there. As it was, the scripted required Carol. And they made her Christine's friend.
So you didn't get Rand or a physical representative of Chapel this time, but you did get Carol in a meaty role, a new bald female navigator and
the return of Madeline, who even got lines!