Amazon Kindle Fire HDX 7" & 8.9" (apollo / thor) for /e/OS-nougat 0.21
e-0.21-n-20240503-UNOFFICIAL-apollo.zip
https://sourceforge.net/projects/eosbuildsronnz98/files/OtherSmartphones/e-0.21-n-20240503-UNOFFICIAL-apollo.zip/download
e-0.21-n-20240503-UNOFFICIAL-thor.zip
https://sourceforge.net/projects/eosbuildsronnz98/files/OtherSmartphones/e-0.21-n-20240503-UNOFFICIAL-thor.zip/download
Please see sources and install instructions including recovery here:
https://xdaforums.com/t/rom-apollo-thor-lineage-14-1-17-mar-2022.4398657/