This may have been caused by changes in #785

Steps:

1. View package search endpoint for v7.16.2: https://epr.elastic.co/search?kibana.version=7.16.2
2. Observe that security_detection_engine package, which is GA, is not part of the search results
3. Add experimental flag (prerelease works too) https://epr.elastic.co/search?kibana.version=7.16.2&experimental=true
4. Observe that security_detection_engine now appears

This package version is GA, so it ought to be returned in the search results regardless of any release parameter: