Hi @arkkgroup ,
There are two options to embed an image in the Send Email (V2) action, one from OneDrive and one from SharePoint. The following flow shows both processes, they are similar but configured differently.
Regardless, in your use case, you need to save the image you received into OneDrive or SharePoint and then use the appropriate actions below.

On the OneDrive side (left side):
Compose action:
dataUri(body('Get_file_content_using_path_2'))
Here's the Send Email action:

On the SharePoint side (right side):
Compose action:
@{outputs('Get_file_content_using_path')?['body']['$content']}
Here's the Send Email action:

In short, this has been successful for me and works with either OneDrive or SharePoint.