What's on my phone? Spyware?

I own a Verizon Galaxy s9+ and A galaxy tab s3. For the past few months I've noticed strange things going on with my phone and for at least 6 months on my tablet. Even factory resets don't solve this. I feel like I've googled everything to no avail. I started to think I was just crazy, until the other day I went to add a new account to my phone, an email account, and noticed something strange under accounts. I don't see any abnormal accounts under "accounts" in settings, but when I click "add account" there is a strange icon with no title next to it, like its hidden, and it has the green circle next to it like its been added, but I can't click or see what it is. Please help! I used to be super nosey on my bfs phone and now wondering if he's had something on mine for a while as well?? Thank you!!

This is "accounts"

And this is under "add account" menu