Video 1.
PCIe computer explained by ExplainingComputers (2018)
. Source.
lspci is the name of several versions of CLI tools used in UNIX-like systems to query information about PCI devices in the system.
On Ubuntu 23.10, it is provided by the pciutils package, which is so dominant that when we say "lspci" without qualitication, that's what we mean.
Sotware project that provides lspci.
lspci is missing such basic functionality!