TL;DR: Nintendo of America president Doug Bowser discussed with Wired the impact of new tariffs on the Nintendo Switch 2, which may increase its price from $449 to $600. The tariffs affect manufacturing in Vietnam, Cambodia, and China. Nintendo is assessing the situation, having already moved some production out of China.
Tariffs are not just for new products (new models). As soon as the current ps5 stock of a retailer is gone, they have to order new ones and pay a tariff. Then they make it more expensive for the consumer.
lets say Walmart now sells a ps5 for $400, but in a month they have to order new ones, from China. The order is more expensive than the one last month because of the tariffs, so they pay like 40% more. Walmart will now sell the ps5 for about $550 to you.