Some examples from mine if anyone is curious. I never use the fb sso or any of that shit, nor did I ever explicitly consent to any of these services sharing anything with fb.
- Spotify
- bookings .com
- ebay (haven't touched my account there in over a decade but they still had data to send this year)
- windy .com
- duolingo
- tinder
- my bank
- opera
- sonos (I can't think of any time I've ever even interacted with this one)
- samsung wallet (another one I never even set up)
- Uber eats
- calorie counter
- mediacom usa and euro (?)
Also, if you remove access via messenger app, it will show a confirm message without closing the screen. Clicking x goes back and it's not on the list anymore. Whether they are actually leaving it disconnected or just hiding it, who knows.
Some of these services I didn't use the same email that I used for fb, too, or any email at all.