Hello! I’m a fellow musician and audio engineer. I’m also currently wearing the Widex Moment 440 Sheer HAs.
I think that you’ll find that the streaming option will not work for your ear monitoring needs. Since it uses bluetooth for the wireless protocol, latency (audio delay) will be too high for your comfort - especially as a drummer. My best advice for live monitoring would be to either use in-ears or very high isolation headphones. Work with your monitor engineer to develop an accommodative EQ curve and appropriate limiting for your hearing. This is what I’ve done for myself and other band members. It works incredibly well and my monitoring has never sounded so good - even when I was 20 years old.
I’ve made the careful decision to minimize use my HAs for performing or critical listening of music. I use them for all of my other life activities. In this way, they add value to everyday interactions and sounds of life while minimizing the inherent fidelity problems that are limits of the current technology when used with music.
I have a more detailed thread going here if you’re interested: https://qa-forum.hearingtracker.com/t/lifelong-musician-audio-engineer-dives-into-trials-of-has-heres-my-story-and-experiences-thus-far
Thanks and good luck!
Chris