My Librem 14 has a microphon+camera kill switch. Also, on Qubes OS, everything runs in VMs and you choose explicitly which one has the access to microphone and

My Librem 14 has a microphon+camera kill switch. Also, on Qubes OS, everything runs in VMs and you choose explicitly which one has the access to microphone and camera (non by default). Admin VM has no network.