It's possible to create Features and Ideas based on triggering events in Zapier, but often it's the Requirement level in Aha! that gets mapped to individual stories in other tools, not Features.
It should also be possible to have Zaps that will create Requirements. The Zap should require specifying a designated "Requirements Parking Lot" Feature in Aha! to which the Requirement can be added.
As noted, we currently provide the ability to create features an ideas through Zapier. However, we do not have the ability to create requirements as they need to be associated to specific features.
At this time, we do not have plans to allow standalone requirements (without features - or a generic feature) based on current priorities and community feedback. We hope you can understand.