The Iframe Button allows you insert an embed URL so that when the user clicks the button, the dynamic content will open up/appear.
To use this block, insert the Iframe Button from the block list.
Insert button text & paste an embed URL into the link field and click Preview:
You can then change the button style from the right-hand settings panel:
This Iframe Button block can be used on any Post or Page and can be inserted on it’s own, or within other blocks like Sections, Columns, Call to Actions etc.