The values shown in facets depend on what is indexed and what is currently filtered in the search interface.
We are not directly using the tag repository, you need to index content that has these tags.
There are many reasons as to why it would not show some values, here are some things to validate:
- Not indexed at all
- Items with your tags have not been reindexed with their new tag for some reason. => Reindex
- Items that do contain those tags are not in the crawled root. => Change the crawlers
- Security
- Your public identity does not have access to those documents. => Validate the security and adjust as needed.
- Items that have those tags are not returned in the results
- By default, Coveo for Sitecore shows only items that has a layout, with the current language and latest version => Remove those filters and see if they show up, or simply go in the Cloud Administration Console and test some custom queries.
- Other custom filters added to the
aq
part of the query => Validate anything custom and see if they interfere.