It's possible to build a lineageos ROM from source, mostly. There are still some binary blobs and it's true that virtually no one has the time to rigorously aud

It's possible to build a lineageos ROM from source, mostly. There are still some binary blobs and it's true that virtually no one has the time to rigorously audit the entire source tree themselves anyway, but technically you do not absolutely have to trust a giant ROM binary that their auto-builder spit out.