How to find a component list

How do I find all the components of my car like you guys have

That is one heck of an open-ended question.

As it's posted in this forum, are you looking at the electrical hardware side or the vehicle itself?

If the latter, then some information - like the vehicle model, year, engine, transmission, any other mod's, would help?

What part(s) of the vehicle are you interested in modifying - engine, transmission, suspension, brakes, engine swap, NA/supercharging/turbocharging, engine management - ECU - type(s), display if any?

Vehicle use and torque/power levels desired?

Budget?

Oh, since some states are clamping down on it - with some justification - emissions requirements?

That's just for starters - there will be some who can offer help from personal experience, but you have to give the help first.