Ok, I apologize for taking a bit but I wanted to set them up to be sure it would work.
You will open the IFTTT app on your phone and at the bottom it should say ‘Get more’, tap that and you see a search bar with a ‘+’ below it and to the right, tap on that. Tap on ‘this’ and search for ‘button widget’ and choose that. You will then see one option which is ‘Button press’ obviously choose that.
Now set up the ‘that’ portion, search for ‘WYZE’ and choose it. There will be choices for ‘Turn on notifications’ and ‘Turn off notifications’. Choose one of those, then click finish. You will then need to do the exact same process and under ‘WYZE’ do the other one (on or off, depending what you did the first time).
That sets up both rules you will need. Now for the widget.
Long press on your home screen and then select widget. Find IFTTT and add a widget it will ask which rule to use and you will set a button up for each one and name it accordingly.
If I did not miss any steps that should achieve what you want.