Why this system table doesn't appear on dictionary table?
I do not know any proper explanation. It has always been like this. Maybe Oracle was lazy, forgot to update the DICTIONARY view and noone even bothered to report this. Maybe there is a real reason for this.

If you check the definiton of the view DICTIONARY (DICT is a synonym for that), you can see it is a union of 3 branches (simplified):


ALL_*, DBA_*, USER_* views
A specific list of other views
Some others views that have public synonyms created on them with a different name (like DICTIONARY and DICT)


The problem is with 2. in my opinion. These newer views do not follow the regular naming schema and they should be included in this list.

I had the same experience with views related to Data Redaction.

Views such as REDACTION_POLICIES or REDACTION_COLUMNS are also not listed in DICT/DICTIONARY.