ARI has a valve that they call a 'dynamic combination air valve'. See here for details: https://www.arivalves.com/products/water-supply/item/d-070-dynamic-combination-air-valve
This is similar to HAMMER's slow closing air valve, but only starts to close once all air has left the valve. This feature is supported by your competitors.
We're making this available now as a patch for HAMMER 2023 (contact technical support for assistance), and plan to have it included in the next update release.