I got an upgrade and applied it to the nomination, but it does not go into review for more than 3 days. Rather, the nomination that applied the upgrade later than that nomination went into review first. What happened?
Hello and welcome,
What an upgrade does is open up your nomination to a larger review area. It doesn’t guarantee it will go into voting quicker; it can still take 1-7 days for an upgraded nomination to move into voting as it depends on the number of reviewers in the larger area, as well as other nominations that may be in the upgrade queue before yours.