Are you following these instructions?
First of all, the 4 files ending with sha256sum
are just checksum files to avoid corrupt downloads.
Probably the two files the instructions mentions and you are looking for, are:
- recovery image: lineage-18.1-20230613-microG-jfltexx-recovery.img
- LineageOS with microG image: lineage-18.1-20230614-microG-jfltexx.zip
I don't know jfltexx and have only skimmed the instructions. Please read them carefully and always double check.