Hi there @MP123! In Canvas Discussions, there is a search bar, where you can type in your name to see all instances in the Discussion where your name appears, so you can easily hop right to it! Depending on what version of Canvas Discussions is enabled for your class, that search bar will be right above or right below the Discussion prompt. 

Additionally, when you are in a Discussion, you can press Ctrl and F on your keyboard at the same time to open up a search bar where you can type in your name to search for your posts. 

The replies in Canvas do have that organization where all the replies to your post will be right underneath it, and your replies to other folks will be right underneath what you responded to as well. And in the newer version of Canvas Discussions that will be in all courses starting this summer, you and your classmates will be able to tag one another to help you quickly navigate to where you need to be in a discussion!