I’m having exactly the same. Although I have successfully implement the entire zoom-like translations feature. These two are my problems. No browser running in iOS is capable of handling individual audio levels for participants.
Any news on this?
I have received reports of some iPhone users successfully using the system, but I have no additional information that would be helpful (like what versions and specific browsers they are using). I suspect it works better on more modern versions and fails on older versions.
Also for the record - there is no longer any need to apply patches - the pull request has been incorporqated into Jitsi Meet core.