Hi Pong99 ,
Thanks for reaching out to us!
It may have been due to browser cache that you couldn't see the mobile button.
Could you try publishing your changes in Buttonizer again and then visit your site on incognito mode on your phone?
If you've done that but it still does not show up on mobile, could you maybe let us now which device and version are you testing this on? We would like to try to replicate the issue on our end and see if we can figure out what's causing the issue.
Please let us know how it goes! 😄