Support for New Google Sites?

Hello,

It seems like New Google Sites is out now. How can I add a from on a new google sites page?

The new Google Sites doesn't seem to be available on my account just yet, so I am unable to test it. However, I checked the Google Sites help page and it looks like to add a form to the google sites, simply click the INSERT button from the menu on the right and then select Embed URL. You can also check this guide for more info: Add text, images, & other content 

To get the URL of your form, simply follow this guide: Where to Find My Form URL?

If you need further assistance, please let us know.
Thank you.