Send later mailbox location????

I scheduled a couple emails to "send later" for the first time recently. I was using Apple Mail on my iphone which has iOS verson 16.1.2 on it. I scheduled them to send to myself and I received them. They showed up in my sent folder after I received them. SO that part worked.

But while they were waiting to be sent where did they go? What if I do this in future and want to cancel or change a scheduled email? I read that there is a "Send Later" folder or mailbox but I don't see one on my phone or when I signed onto my computer. They were not in "Drafts" either....