HI , @Convoi123
According to your description, you want to use the "Office365Outlook.SendEmailV2" to send pdf and image from the attachment control and add image control. Here are the steps you can refer to :
(1)This is my control in my app:

(2)We can use this code in the Button-Onselect:
ClearCollect(attaches,{Name:AddMediaButton1.FileName,
ContentBytes: AddMediaButton1.Media, '@odata.type':""}
);
Collect(attaches,AddColumns( RenameColumns( Attach.Attachments ,"Value", "ContentBytes") ,"@odata.type","")
);
Office365Outlook.SendEmailV2("AniyaZhang@xxxxxxxxxx.onmicrosoft.com","email with attachment" , "here is your picture",{Attachments:attaches});
(3)The result is as follows:

And we need to keep the Attachments parameter is a table type with the columns:
"Name","ContentBytes","@odata.type"
If I misunderstand what you mean, you can describe your needs and your expected outcomes in detail so that we can better help you.
Best Regards,
Yueyun Zhang