Marriages information gap in León, Guanajuato - Registros parroquiales 1636-1961 from 1833 to 1855

Hello,
Hoping I'm not posting this in the wrong category,
As many of you, I'm trying to track my family tree, and I've been stuck since most of the marriages from León, Guanajuato in between the years 1833 to 1855 are not listed.
I find it weird these records are not listed, then I'd like to know if these exist and are not uploaded or these are missing even in church records.
These records are key for my investigation since there are some marriages happening in these years and hopefully these contains the parents name's of those I'm looking for.