Looking for directions on how to Embed an Order Form in an iFrame

Are there any official directions on how to Embed an Order Form?

I’ve been reading about how an iFrame may work to allow me to keep the same domain for the Company. This is a companion questions to “How Does Keap DNS Work”: How Does DNS Work with Keap Max Classic? - #4 by Thom_Tessandori

Ultimately I’ve been tasked to keep the Customer on the same domain without sending them to Infusionsoft.

Thanks!