Here’s my build of LineageOS 20 for Raspberry Pi 5. It is unofficial and unsupported by the LineageOS team. It’s for advanced users only.

Important! This image includes parts that are licensed under non-commercial license (Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International). You may use this build freely in personal/educational/etc use. Commercial use is not allowed with this build! You can contact me by email to discuss creating customized Android builds for commercial purposes.

Working:

Audio (HDMI, USB microphones, bluetooth speakers/headphones, etc)
Audio DAC (using GPIO DACs e.g. Hifiberry DAC+)
Bluetooth (and bluetooth tethering)
Camera (using official Pi camera modules & UVC USB webcams)
GPIO
GPS (using external USB modules e.g. U-Blox 7)
Ethernet
Hardware accelerated graphics (V3D, OpenGL & Vulkan)
Hardware video decoding (H.265 decoding)
HDMI display (and HDMI-CEC)
I2C
IR remotes (using external GPIO IR modules e.g. TSOP4838)
Power button
RTC
Sensors (using external GPIO I2C modules e.g. MPU6050, LSM6DS3, LSM303DLHC, BME280/BMP280, and APDS9930 accelerometer, gyroscope, magnetometer, temperature, pressure, humidity, ambient light, and proximity)
Serial console (using external GPIO serial console adapters e.g. PL2303)
SPI
Touchscreen/multi-touch (official 7” touchscreen, USB touchscreens, Waveshare SPI touchscreens)
USB (mouse, keyboard, storage, etc)
USB-C (ADB, MTP, PTP, USB tethering)
Wifi (and wifi tethering)
Issues:

Issues with DSI displays (Issue#58)
Some audio DACs need additional configuration (Issue#5743)
Various issues with CSI camera modules
SELinux is in permissive mode
Encrypting userdata is not supported
and more…
Sources:

kernel
Thanks:

Roman Stratiienko and GloDroid project
Peter Yoon and android-rpi project
AOSP reference board developers (dragonboard, hikey, yukawa)
Android-x86 project
LineageOS team and everyone who has contributed to LineageOS 20