Unfortunately you have to use what is available, e.g. the SimaPro panel EPD.
You can do some research on racking systems and probably figure out some generic rules of thumb of lbs/kg per linear foot/meter of panel. Electrical infrastructure based on your building’s design, how many linear feet from PV to electrical panel, etc. Inverters seem to still be missing piece of information, like lots of other equipment, unfortunately.
I think you’ll quickly learn that there is no easy way to do this. You often have to piece it all together yourself.