Is it a M1 chip?
We’re having the same issue with picking refresh rates which I think is linked to something quirky Apple is/isn’t doing on the M1 chips.
My 2018 MacBook Pro works fine, can select refresh rates… M1 Mac Pro doesn’t see anything, M1 MacBook Pro only lets you see 30/60hz but is flaky displaying anything ‘if’ it decides to see it. So the only option would be to have a scaler up/down convert it (Like blackmagic UpDownCross converter) but I haven’t tested if that solves the issue yet since I don’t own one and as they are now, unlikely to every buy one!
Not sure if they’ve improved it but meshtastic also used to require a module per device/phone so sadly you can’t dot them around and allow multiple people to share them like with group events.