Hi @howitzer1972 ,
I have made a test on my side, I also can't find the Cancel option anywhere.
I am afraid the only way you can cancel the flow is in the Run History.
I was also confused about the Docs.
Perhaps you can raise the question to the Blog author about flow.
https://flow.microsoft.com/en-us/blog/
Best Regards,
Community Support Team _ Zhongys
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.