TAbles/Columns missing in information schema

Why would schemas/tables/columns be missing from 
information_schema.tables/information_schema.columns?

We recently promoted some new tables to production but only 2 of the 4 
schemas appeared in 
information_schema.tables/information_schema.columns.

The schemas/tables/columns do exist as expected but they are not 
represented in information_schema.tables/information_schema.columns.

Why is that?  Where can I find the missing info for use in a view that 
displays the tables and columns in a database?

Thanks for your help!

Sue

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Susan E Hurst
Principal Consultant
Brookhurst Data LLC
Email: susan.hurst@brookhurstdata.com
Mobile: 314-486-3261