The Key2 is unique because it requires "device trees" that handle the physical keyboard mapping. Generic LineageOS won't work; it needs to be built specifically for the "Athena" (Key2) hardware.
For the community of QWERTY-lovers, the search for a custom ROM is a saga of "so close, yet so far": The Android 8.1 Wall: Officially, the KEY2 never moved past Android 8.1 Oreo blackberry key2 custom rom
Use the community-released tethered exploit (links typically found on the BlackBerry Reddit The Key2 is unique because it requires "device
as a "digital detox" or secondary device for calls, texts, and music because of its limited app support and physical keyboard. run a Generic System Image (GSI)
run a Generic System Image (GSI). However, without an unlocked bootloader, there is no way to flash these images onto the hardware. The Virtual ROM "Solution":
This process permanently modifies the device's security chain and may result in a loss of certain BlackBerry-specific features like DTEK or the Secure Folder. postmarketOS Wiki 1. Preparation & Unlocking Before you begin, ensure you have a standard (KEY2 LE) model. e/OS community Backup Data: Flashing a ROM will erase all internal storage. Verify Hardware: Identify your display panel (BOE or Synaptics) using the postmarketOS wiki tool
(XDA threads):