You can now unlock the bootloader of your third-gen Fire TV Stick, flash a custom recovery, install Android TV 11 and much more!
FireTV Stick3 - LineageOS 18.1 AndroidTV 11
CeX (UK): - Buy, Sell, Donate
Fire TV Stick 4K Prerooted and Debloated Android TV Rom (6.2.7.6) : r/fireTV
Fire TV Stick 3rd Gen - Incredible Connection
ROM] [unlocked] [tank] LineageOS 12.1
You can now install Android TV 11-based LineageOS 18.1 on your Fire TV Stick
Fire TV Stick Gets Unofficial Android 11 Support
Fire TV Stick Gets Unofficial Android 11 Support
ROM][UNOFFICIAL][11] LineageOS 18.1 for Fire TV Stick Lite/3rd gen (sheldon/p), Page 20
Android TV Android Police
fire tv stick XDA Developers
Fire TV stick 4K - Request a Device - /e/OS community
FireTV Stick3 - LineageOS 18.1 AndroidTV 11
UNLOCK][ROOT][TWRP][UNBRICK] Fire TV Stick 2nd gen (tank), Page 44