N95 is the US standard, so it makes sense the US makes more of these than other countries.
Compare production capacity of N95s in the US with FFP2/3 in the EU, or KN95 in China. Then we'll really see how US production capacity stacks up.
To be clear, I have no idea how these production capacities stack up. But if we want to evaluate medical mask production, this is the comparison that needs to be made.