Amazon Fire 7 (mustang) for /e/OS-Pie 0.23
e-0.23-p-20240502-UNOFFICIAL-mustang.zip
https://sourceforge.net/projects/eosbuildsronnz98/files/OtherSmartphones/e-0.23-p-20240502-UNOFFICIAL-mustang.zip/download
Please see sources and install instructions including recovery here:
https://xdaforums.com/t/rom-testing-mustang-lineage-16-0-25-jan-2022.4234211/
Use it at your own risk!
Please support the developer(s)!