Hosted AUv3 plugins parameter listeners on iOS

Hi,

I noticed that on iOS, it doesn’t seem to be possible to listen to parameter changes for hosted AUv3 plugins. Looking at the implementation in juce_AudioUnitPluginFormat.mm, it seems that right now this functionality only applies to JUCE_MAC.

I was wondering if there were any plans to implement this for AUv3 plugins on iOS? It seems that the system JUCE uses on Mac with AUEventListenerCreate etc. has been deprecated so I guess it would mean a change to the KVO approach as described here possibly? https://developer.apple.com/documentation/audiotoolbox/auparameternode/1440811-tokenbyaddingparameterobserver?language=objc

Thanks.
Tom