You have been saying this sort of stuff on the Qubes forum and a bunch of other places for awhile now.

Hardware kill switches are nice-to-have, but they are significantly less important than the OS actually protecting the mic. With your Librem/PinePhone, you cannot even reasonably expect your calls with end-to-end encrypted apps like Signal and Element to be protected. Any app with access to the PulseAudio socket (which happens to be anything that you want to have audio playback with) can snoop on your mic at any moment in time. This does not even require an OS compromise.

This has been pointed out to you repeatedly and yet you choose to ignore it, and instead you just do character assassination whenever a post regarding GrapheneOS or Daniel Micay shows up because what Micay says goes against your favorite ideological products...

Their entire post regarding pinephones is accurate.

Hardware kill switches need to be correctly implemented. A kill switch cutting off mics and not sensors or speakers is incomplete and privacy theater.

Not to mention kill switches assume the device is already compromised, at which point everything on it is likely compromised as well.