I have been making unofficial builds (of iodé 5, the iodé 6) for the Nokia 6.1 Plus DRG though for some reason it never made the list of unofficial devices in this post. The latest build is 6.16, available here.
LneageOS have stopped supporting this device in this commit
I plan to continue making iodéOS builds for the device (though builds of los4microG will stop), but I’m definitely not providing any support for it. If you have one of these devices, good luck!