Your domestically produced food was grown with engines powered by oil bought from abroad, because the stuff the US gets out of the ground isn't right for the US refineries: https://www.marketplace.org/2024/05/13/the-u-s-exports-more-...

Likewise, the US imports fertiliser: https://tradingeconomics.com/united-states/imports/fertilize...

Several critical minerals just aren't mined at all in the USA, they have to be imported. Anything that needs those to be produced, just got more expensive, regardless of where the factory is.

Your domestically produced cars were made from imported parts, sometimes with multiple border crossings.

Your domestically produced big tech runs on servers with many imported components.

Not all goods will be affected equally, but it would be hard to imagine production costs would not increase on domestic goods.

Also reduced competition might lead to overall higher prices.