unmuting a dial-in participant

I would like to be able to unmute a blind dial-in participant who has much trouble unmuting herself. I am able to unmute each of the other participants because they are using the Zoom app and have given the host permission to unmute them. Is there a way for the dial-in participant to give the host permission to unmute them? If not, is there any chance Zoom may add this functionality at some point? TIA