What area are you looking for a census? The next census to be released in the United States will be the 1950 census.
In the United Kingdom, they will be published in January 2022.
Looking for 1850 Illinois.
if thats the case - it would not be "newly listed"
1850 census index has been available for decades.
see all the historical source here:
and pick the ones you want to search.
what specfically are you looking for on the 1850 census
Oldest I can find is 1855.
If you do a search on "1850"
you will get this result:
which then will include the 1850 US census which is here: