Since a focus group disappears when clicking outside of it, and if you click on the button that activates it, which is outside of it, it will hide and immediately show it again, here is what you can do:
Set the workflow on the button that activates it to Show Element when button is pressed:
then set a condition on the button that when the focus group is visible, the button isn’t clickable, which would essentially make clicking on it a “click outside the focus group”, which will hide it, and reset the button to be clickable:
