Remember to replace FORM_ID in the shortcode with the correct Form ID of your form.
You can the Form ID in the form settings.

NOTE: You must click the "Save" button to create the form first, then the Form ID will appear.
In our example, the shortcode will be: <div contactform-embed='224148'></div>
There are some ways to add this shortcode to embed the form:
Method 1: Add to the page content using the app block
- Go to your theme's customizer
- Go to the page you want to add the form (e.g. contact page)
- Click on "Add section" > Apps > Contact Form Embed

- Select form type as "Embed form" > add the Form ID

- Save > The form is embedded to your page successfully.