How can I find out how much labor / touch time there is for a lower-end vehicle from GM, Ford, Tesla, Toyota, and BYD? Even better if someone has numbers for s

How can I find out how much labor / touch time there is for a lower-end vehicle from GM, Ford, Tesla, Toyota, and BYD? Even better if someone has numbers for specific models, like the Equinox EV, Mach E, Model 3, BZ4X, or Han. Can I assume that battery pack assembly is mostly automated?