I have two approval flows, one for modification, another for new item.
The modification approval flow screen capture:

The new item creation flow screen capture:

4 months ago when I created the approval for modification, it's been saving the notification emails in my Outlook Sent Items, as I am the "From" person in the email. To make it clear, I was never the one who did the modification or creation nor approval. I happened to be the one who created the flows. I can ignore the notifications but it would be nice not having them get in the way of my other sent items. At the mean time, the new item approval flow did not send me any notification, until January 21, 2021. This time, they show up on Teams. My Teams activity got flooded.
What happened, why did the notifications showing up in two different applications? How do I change or opt out of receiving the notifications, esp. the ones on Teams? I don't know how many employees are seeing them, or just me. And in the future, how do I change to someone else or another email?
Thanks!