I don't have EF and I don't know how else I can look that up.
Anyhow, I chatted on HA app. One said I was already upgraded and the next one said first class was sold out.
Fed up with nonsense, I called.
Got transferred to loyalty department. After combined 79 minutes on phone, supervisor manually upgraded me and sent an email confirmation.
Lesson learned here is, to NOT check in before calling in which causes errors on their system and if something doesn't feel right past T-48, something probably isn't right. There were 7 open seats (out of 18) at T-72 in my case.