You can write the code yourself, or you can contact experts, or use plugins that can generate code for emails.
UX/UI designer. Figma expert. Creator and developer of plugins and widgets for Figma and FigJam. Check out my resources in Figma Community: figma.com/@tank
I believe that one possibility would be to use a third-party platform. At Albato, for example, I know that you can insert the page’s HTML code into the body of the email to send it via Gmail - Integrate Gmail with you favorite apps | Albato