Sandboxed macOS app unable to load Audio Units

I've a music app for Mac, almost complete, supposed to be distributed trough the Mac AppStore. It has and Audio Unit extension (sandboxed), that it is correctly instantiated from Logic and other DAWs. The container app itself however, when sandboxed, it's incapable of loading any third party Audio Units, not even its embedded one.
Removing the sandbox from the container app, everything works as expected.
Are sandboxed Mac apps prevented to load Audio Units? If this is the case (quite odd), my only solution is to distribute my app outside the Mac AppStore.
Is there something I'm missing? Any advice?
Thanks
Answered by Michele Longhi in 647184022
Turns out the host app requires a special entitlement key (com.apple.security.temporary-exception.audio-unit-host) that has to be then authorized during the app review.
Accepted Answer
Turns out the host app requires a special entitlement key (com.apple.security.temporary-exception.audio-unit-host) that has to be then authorized during the app review.
Sandboxed macOS app unable to load Audio Units
 
 
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