Not only material costs go up with inflation.
Those materials have a price because you need labor to obtain them. The cost of everything is driven by the price of labor. The price of labor goes up with inflation.
There is no product that is unaffected by inflation.
Inflation is not the only factor in the pricing on products. Otherwise a potato would cost 1000x what it does.
Even then, all the things you mention are media that was already produced, and the only cost associated to them now is licensing and distribution. Satisfactory is still in production, which costs orders of magnitude more.