Are there any compatibility issues with the Apple dongle on Windows and on Android devices (in particular new Samsung Galaxy phones)
I bought one with the UGreen USB-A to USB-C adapter, for use on my Win10 HP Zbook Studio G5 laptop from work. I plugged it into the laptop's USB-C and USB-A (3.1) ports, and into a cheap powered USB 2.0 hub, all worked, note that something needs to be plugged into the dongle's jack to get it recognized as an audio device. In my case this is a Zen Can with Sundaras.
The combination with the USB adapter seems a bit finicky, I only got the laptop to recognize the dongle on the USB-A ports by first putting in the adapter, then the dongle and finally the jack-to-jack wire to the Can line-in. Recognized once by Windows it seemed to work fine from thereon. Also tried it on an old laptop with only USB 2.0 ports, with immediate success.
Before this I used a Fiio K3 as DAC in this setup, with its lineout to the Zen Can, for the Apple dongle you need to turn up the gain one notch as dongle doesn't reach 2vrms, like the K3 does. To my ears sound quality is good, or at least equal to the K3 DAC, be interested to hear how you experience it (yes I got the European one, A2155)
Finally I inserted the dongle into a RPi (2/3), with shairport-sync installed, and that didn't work out, sound dropped every second, I'll retry that with a Volumio distro later on. Using USB devices on a Pi is a different can of worms.