You’re likely just using a query that doesn’t return any result. Just use qb.all().createQuery() (and don’t forget to limit the number of results).
It will return all documents, proving that indexing worked fine.
As to why your query doesn’t work… Note that wildcard queries are case-sensitive, which might explain why you’re not getting any result. You will find many answers on the specific topic of wildcard queries vs “edge-ngrams” analyzers on stackoverflow, and some in this forum. Have a look and try the suggestions.