I would like to see a commercial phone with LineageOS in Europe, that's fairly cheap.
But vendors are pushing now for 2000€ phones none needs because they can fold
Some older devices are supported through some weird unofficial sites where you have to send in your IMEI, which is obviously shady...
Also they don't update their kernel sources in a timely manner at all. Which makes developing custom ROMs WAY harder..
So sadly, Nokia sucks if you wan't custom ROMs, I ditched my Nokia 8 for a Poco F1 for this reason.
The older models used Cyanogen and then moved over to Lineagos
Cheap and cheerful.