Hi Patrick
We only allow inserting the whole event detail page or registration form of an event into an article
We don't have a way to only show the button. However, it is quite easy to setup (we can help with sample setup if needed):
1. Create a hidden menu item to display events list (using upcoming events timeline layout menu option for example)
2. Access to that page, get the links of the registration button, insert into the article you want
After that, it should work as expected
Regards,
Tuan