Welcome to the forum! We have been chatting on your work for free post already but the prompt to welcome you is here =)
Since you just started reviewing, you may not be aware of the situation. Since about March of this year, Niantic’s ML model was accepting or rejecting all the easy decisions, leaving us with just the in-between iffy nominations to review. So many of us were having our nominations decided in 24 hours, that upgrades were just stacking up with no use for them. I used to have to use them in order to get a decision in less that a year (or more), but now I have this many:
ML was taken offline a while back, and while rejecting has been turned back on, accepts have not been. (See ML Auto-Decision Issue)
I LOVED 24 hour accepts, but I must admit that reviewing is much more fun when we get to see easy things to accept come through voting.