This is something I’ve taken for granted as per app volume control is integrated into the OS on Motorola phones and I’ve been using mid range Motorolas since the Moto G 4 in 2016 (they offer a reasonable price, reasonable performance, microSD card and headphone jack).
Then I was setting up a Samsung tablet last weekend and was horrified to see I had to use the Samsung store to download Sound Assistant for something I had just assumed was a standard OS feature for close to a decade.
I don’t think anyone expected MS-DOS 4.0 (1986) to release under the MIT license in 2024
https://github.com/microsoft/MS-DOS