Bearing cone and locknut won’t tighten. Easily fall off when taking wheel off. Has it snapped? Recently I noticed a ball bearing had almost fallen out of the hub so I took the wheel off to find out what’s wrong and the cone that covers the bearings just fell off the wheel! Not the one but both. I took a closer look and noticed there was another piece inside that the QR goes through, but that was loose as well and it almost fell out of place when I touched it. So i’ve put everything back in place and put the wheel back on my bike and left it alone.

Can anyone tell me if it has snapped or what’s wrong with it?
Yep, axle is broken.

Do not ride the bike with the broken axle! The axle is supposed to support the frame on the wheel, but you are now asking the quick release skewer, which has much less material and strength, to do that. If the skewer fails, the wheel will come straight out of the dropouts and a nasty crash will likely ensue.