no-recovery-installer.sh

cd /tmp
wget https://mirrorbits.lineageos.org/full/lavender/20220308/lineage-18.1-20220308-nightly-lavender-signed.zip
unzip lineage-18.1-20220308-nightly-lavender-signed.zip -d extracted
cd extracted
brotli -d system.new.dat.br
brotli -d vendor.new.dat.br
wget https://raw.githubusercontent.com/xpirt/sdat2img/master/sdat2img.py
echo "35c39baf6f7e700e4cbebf70b86d602e312e3146e58ec1e8b08c1baf046edeb9  sdat2img.py" | sha256sum -c
python sdat2img.py system.transfer.list system.new.dat system.img
python sdat2img.py vendor.transfer.list vendor.new.dat vendor.img
mkdir mount
sudo mount -o loop system.img mount/
sudo mount -o loop vendor.img mount/vendor
sudo find . -iname recovery-from-boot.p #./mount/vendor/recovery-from-boot.p!
sudo find . -iname install-recovery.sh #no matches!
sudo umount -R mount

repeat with another similar target such as lmi, and you'll find both files!