It is very simple and straightforward to add 3rd party embeds like forms, booking calendars, etc to your landing pages.
All you need to do is copy and paste the 3rd party custom code within the HTML module on the page.
Let me show you how you can do this.
First, add an HTML module to the page.
Here is how you can add the HTML module to the page. Please see the video attached below.
Click on the HTML module and paste the custom code in the middle of the two paragraph tags.
Now, save and publish the page.
Note: The functioning of custom codes cannot be viewed through the Preview mode. It can be viewed only on the published page.