And on mobile, things like https://grayjay.app/

if only this existed for meetings

It does, its called Jitsi https://jitsi.org/

"Jitsi is a set of open-source projects that allows you to easily build and deploy secure video conferencing solutions. At the heart of Jitsi are Jitsi Videobridge and Jitsi Meet, which let you have conferences on the internet, while other projects in the community enable other features such as audio, dial-in, recording, and simulcasting."