iframe support

For those wondering why his plugin appears not to work is :

//support.duda.co/hc/en-us/articles/1500001499461-Load-Site-in-an-iframe

By default, the ability to load your site in an iframe on another site is disabled. We recommend not changing the default unless it is mandatory for your specific site. Sites created before April 5, 2020 are permitted to be displayed in an iframe.

To enable the ability to load the site in an iframe:

In the left panel, click Settings, and then click Site SSL.
Click the Allow site to be loaded in an iframe toggle.

or go to your SSL provider and look for (in their settings) etc or: ask them to remove restriction..