or Pixel Experience support for the Nokia 2.3. You may find unofficial "Generic System Images" (GSIs) on forums like XDA Developers
Because of the bootloader issue, there are (such as LineageOS or Pixel Experience) specifically built for the Nokia 2.3. nokia 23 custom rom
Regardless of the specific model (let's assume you are working with a Nokia device from the 2–5 series range), the remains the same: To rid your phone of bloatware, upgrade past the last official firmware, and breathe new life into aging hardware. or Pixel Experience support for the Nokia 2
If you manage to unlock the bootloader, the general GSI installation steps are: upgrade past the last official firmware