No Apple Watch, unable to save or stack Fitness Challenge

I am looking to do the 30-day Core Challenge. I don't use an Apple Watch. I say this, because it is the only reason why I think I might have a problem. But, when I open the 30-day core challenge in the app there is no place to save it or make it a stack. Instead I have had to create the note with the challenge link so I can open it up in Fitness and remember what I have completed. Am I missing something as to why I can't just save it to return too daily?

[Re-Titled by Moderator]