They relied mainly on PacBio HiFi reads (which I think is a truly understated revolutionary technology in genomics), then used Nanopore sequencing to link toget

They relied mainly on PacBio HiFi reads (which I think is a truly understated revolutionary technology in genomics), then used Nanopore sequencing to link together the HiFi contigs to cover the truly gnarly regions of the chromosome. And yeah, you're right: All modern large-scale sequencing is shotgun sequencing where the DNA is randomly broken up, each fragment is sequenced, and then the individual segments (reads) are assembled using a genome assembler.