I’m new in the printing world. So i don’t have that much different filaments like i see with others 
. But i think it would be very helpfull that if you see i model on makerworld, that there would be an option to press on a link, where you get directed to the used filament in the bambu store. So it would be easier to buy the right filament directly. It is already integrated in the maker lab. There you can press a link for the right led for example. So it would be possible i’d think.
Err… some print profiles have this. Look in the model info. As in it tells you the bambu color.
Also 2) most things are “just pla” you can match the colour visually or just use your own color scheme
Not every model is made with Bambu filament. The ones that are will often include the links in the profile.
From my experience I have had no print that turned out poorly because of my colour substitutions. You have to watch out for materials though! The only place I think I have cared is when it comes to models that use something like Hueforge, and that is only because of how some filaments are more translucent than others and it can really make a difference.