One of the latest updates of the tokenproof app may require some additional configuration. Inside the admin dashboard, go to Settings (within tokenproof App), then click Preview in theme.
In the left panel, click on Sections
When enabled, Tokenproof Button is within 'Apps' and inside 'Product Information' by default, but you should be able to drag and drop it wherever you want, for example, below Buy Buttons. Once you have made the changes, remember to save.
You should now be able to see the buttons correctly in your store. But if you still don't see the Tokenproof Button on the previous screen yet, click on Add Block
Then click on Tokenproof Button. You should now be able to position the button where you want. Remember to save your changes when finished.