Hey, How do I pipe audio from one (application/device) to other (application/device)?

Let me explain with an example,

I use google meet a lot but when I am sharing my screen, the audio from desktop isn't audible to my friends on meet, I know there is a option to share audio in pavucontrol and it works, but it will cut my voice and start sharing desktop audio. ***

I want to add both my voice as well as my desktop audio and send it to the browser. How do I do this?

*** Also that pavucontrol option used to work and now that also doesn't seem to work