In essence it's not much different than regular Linux distributions. There are some quirks related to pmOS being a derivative of Alpine Linux. It uses musl instead of glibc, so don't expect meaningful NVidia support. Other than that, it's regular kernel, regular Mesa. (Native package selection is much smaller than anything mainstream, Flatpak works, though.)

I couldn't get a stable WiFi connection using WPA3 Personal. Not sure what the fault is. Switching the connection over to WPA2 in Plasma's Network settings did the trick. This PC's trackpad and touchscreen work absolutely fine but – and I think that's how the hardware is designed and nothing to do with pmOS – the trackpad doesn't show up as trackpad but as a mouse. So I cannot reconfigure it to use two finger scrolling. Scrolling is always on the left edge.

Websites claim that this PC supports bluetooth but the adapter doesn't show. As I wrote in another comment, I suspect a hardware defect, given how abnormally unstable Windows 10 was. I need to get my hands on a USB Bluetooth dongle. I use my headphones via USB in the meantime which physically tethers me to the device but works fine.