I haven't even upgraded to Android 10.
I've got Android 9. Because I put an AOSP ROM on it. When Android 10 was released you can't just flash the ROM because Android firmware bullshit. So you flash the stock Android 9 ROM and update it to 10 to get the firmware, then flash your custom Android 10 ROM.
Problem is Sony seem to have stopped providing downloads for my region's XZ3 ROM. Software like XperiFirm will only give me the Android 10 ROM for my region. I tried flashing other region's Android 9 ROMs for the XZ3 that I found, but none of those seem to get me the Android 10 update.
So until I somehow figure out how to get a Nordic Android 9 stock ROM for my XZ3 I'm stuck here.