How to disable iphone charging sounds?

It beeps every 15 seconds during whole charging time, not just the first time.

I am using wireless charging station so it's not "plug in".

Even it's just once, apple should have a way to turn off the beeping sound, instead of mute whole phone.

that also mute all incoming calls, that's not cool...

just wondering if there is other solution, it keeps beeping while I am working in the office, it's pretty annoying, all people in the office don't want to hear the constant beeping, and I don't want to miss any incoming calls while it's charging,

why Apple did such bad design...