Good morning, @dm200400600 ...
If you go to How do I view and sort discussion replies as an instructor?, do you see a three-dot kebab icon near the top right side of the page (just above the "Quick Links" button)? If so, click on the three dots, and there is a "View History" option (at least there is for me). You can then "View old history" to see old versions of this Guide. (I think you need to click on the date, and the version of the Guide appears below it.) You should be able to do this with pretty much any Guide here in the Community.
All that being said, I don't think the Guide you and I have linked to above is the correct Guide to be looking at. Instead, I think you'd want to be looking at this Guide:
How do I allow students to like replies in a discussion?
When I view the edit history of this Guide, it appears that the "Sort by likes" check-box was removed on February 15, 2023. I looked at past revisions as well, and "Sort by likes" was there on January 19, 2023...but then it was removed a month later.
Unless I am missing something, I'm not seeing any mention of this being removed in any of the latest Canvas Release Notes or the Canvas Deploy Notes. 🤔☹️
I'll see if I can contact somone from the Documentation Team at Instructure to see if I can find out why this was removed and not mentioned anywhere. Stay tuned.