Commissario
Raw materials are there, but there have been issues with everything from getting them out of the ground, to processing them, to transporting them, to making them into components.
As others have said there have been shortages of such simple things as lumber (an order of magnitude or three simpler to produces than a graphics card), concrete, plaster/plasterboard, even cardboard is apparently becoming an issue.
Even things like food has been an issue because the supply chain has been built to supply X amount in bulk to restaurants where rather than say making 50 small packages they'd make one large one (flour was a great example, the flour was there at the mills, but packaged for industrial use not the 1-2kg home cooking supplies that were suddenly needed). I've had trouble getting marmite at times (and no 500g bottles at all), because it's a byproduct of brewing and the breweries they get the yeast from have largely been shut down/at reduced capacity.
The supply chain in the modern world is extremely tight and relies on extremely narrow margins in terms of timing for a lot of things, often at the same time as requiring staff to work in close proximity to each other for shifts, and if you suddenly have to "just" increase the distance between staff in a factory it can mean things like running at half capacity because you've built the lines for maximum efficiency with staff maybe 1m apart.
ffs!
