Please add some sort of clear indication if I mute (or set volume to zero) one of my friends in a private voice chat

Hey there,

Recently I and two other friends established a voice (audio only) call via a **private** dm group (i.e. NOT a Server voice channel), which we used over several days for voice.
Suddenly one of my friends had their audio volume set to zero (effectively muted) apparently by me, and I, of course, couldn't hear that friend. Rest of friends / audio / voices working normally.

It took 2 days to work out that my friend was muted as:
1. I didn't mute them and so didn't think to check this (muting was maybe a bug in dc? Dunno. Don't care). Even if I did reduce the volume one day, several days later I have forgotten that I did this!
2. The problem is that there is NO indication when a friend is muted, or their volume set to zero.

***Please add some sort of clearer indication if I mute or set volume to zero (or near zero) one of my friends in a private voice chat***,
so that dc users don't waste so much time (there are enough audio issues already to waste time on).

Maybe just add the words "Muted volume" under their profile pic.

Thanks.

And just to be clear the support  article:

RE:
Are you having an issue with your mic not being detected, not hearing any audio or having robotic voices?
- Can you check out the article below and look through the troubleshooting steps for the platform/client that you are experiencing issues on?
https://support.discord.com/hc/articles/360045138471

is not relevant.

Yes, I know one of the (many) possible problems in not hearing a friend talk in voice chat is that they may be muted or volume reduced by me.
The point is, if I mute or quiet a friend then there should be some sort of:
1, feedback that my muting was successful.
2. an ongoing clear indication that my friend is muted or quietened (rather than thinking something going terrible wrong with our audio).

Thanks.