Hi @clee1 ...
Thanks for sharing those screenshots. I am not 100% sure of an answer for you, but I *think* a reason why things are different for IP ranges between Classic Quizzes and New Quizzes is because New Quizzes is essentially a LTI tool that was built by Instructure (the folks that make Canvas). As you've probably noticed, the interfaces for Classic and New Quizzes are quite different...and there hasn't been exact parity between them (in both the kinds of settings that can be configured and in the kinds of question types that can be created). If this was something that you'd like to see implemented for New Quizzes, you could certainly submit that as an Idea here in the Community. Here are some documents for you to look at (check out the "Ideas and Themes" section):
Community - Instructure Community (canvaslms.com)
Again...what I've posted above is just a guess, but I hope it might help in some way.