I have kind of the same problem (I just want to root the Nokia 2.2), and I've just seen this announcement on this forum, from Oct 13 2020: "Official LineageOS 17.1 based on Android 10 is here for the Nokia 6.1"
It says that "HMD Global’s Nokia is known for offering a clean stock Android experience on its devices and the stock Android One ROM on the Nokia 6.1 is no different. The OEM, however, cracks down on the ability to modify the software on their devices, which means there is no simple way you can unlock the bootloader of your Nokia phone and install a custom recovery like TWRP, root, and flash custom ROMs (either in the form of GSIs or device-specific ROMs)."
From this it would seem that is actually impossible to root and / or unlock the bootloader of any HMD Global’s Nokia phone (like the 2.2, 6.1, or any other). Is this really the case?