Thank you for helping Numista.
The reviewers on this site are a team of volunteers, each with their own personal lives. There isn't currently enough volunteer time to get to every submission quickly. Also some areas are don't have good experts. From my personal experience many reviews are handled quickly, some get done in batches when a reviewer finds time, and a few outliers can take several months.
(Currently I have a few pending changes to review, all made in the past month.)
The addition of new coins often takes longer (especially for ancient coins) to find an appropriate reviewer with the appropriate information and references.
You can look at your pending edits to see if you missed any actions: https://en.numista.com/catalogue/contributions/liste_demandes.php