I can wear mine either with or without my standard NHS behind the ear hearing aids. I have 5-6 hour long Zoom meetings, and they're fine. I was initially very happy that I could wear them with my hearing aids in, but now when on a Zoom call, I have come to the conclusion that I don't need my hearing aids in, I can hear perfectly without them. Obviously my hearing of what may be going on elsewhere in the house is at normal unaided level, but I'm supposed to be concentrating on the meeting, and if my wife or cat really needs my attention, they can do it louder. I can hear Alfie (cat) perfectly well without my aids, as can the people on the Zoom call, as he has a particularly penetrating miaow, and is way too vocal.
what I also don't understand about my hearing loss, is that when wearing normal enclosed headphones (Sennheiser HD380 pro) my hearing response seems normal, and not its standard attenuated level, missing much of the top end. Being an aficianado of certain organ music, I notice this (but don't understand it).
In short, still very happy with mine (Openmove).