Powering Dashcam from Overhead Microphone Circuit

I am wanting to install a dashcam on my 2017 SR5 that will be powered from a USB cable. I am seeing that a lot of people on the forum are using an adapter harness that plugs into their home link rear view mirror and gives them a USB plugin. My truck did not come with the home link mirror and I cannot find any factory wiring in my truck for it. When the question is brought up in the forums on how to get power for a dashcam from the overhead console, the answer is always that there isn't a usable circuit up there besides the home link harness. But I believe there is a switched power circuit for the overhead console microphone. Does anybody have any experience tapping into the overhead console microphone circuit in order to get 5v switched power? I believe this would be ideal for my situation because the dash camera runs on 5v and so does the factory overhead microphone/microphone amplifier, also I'm not interested in "parking mode" so it works out. I think I could literally just posi-tap the power and ground wire of a USB type-a to type-c cable up to the power and ground wire for the microphone. If there is a reason why this isn't usually done please let me know. Thanks.

 

something like this?

https://dongar.tech/products/12pin-tacoma

 

@jimmyfu Yes that is the adapter harness that is used on trucks that came with the home link rear view mirror. There is many versions of it, whether you buy it from dongar, trail grid pro, bobs automotive, etc. My tundra came with the base mirror, there is no wiring going to it, so I would not be able to use the harness mentioned.