I actually heard about this on Marketplace this afternoon. And to set it up, here is what Trump said about his new tariff regime recently:

"We're making a fortune with tariffs - $2 billion a day"

From The New Republic. Here's the headline and following commentary:
Um, It Turns Out No One at the Ports Is Collecting Trump’s Tariffs

A technical “glitch” has created the biggest hiccup in Trump’s tariffs rollout.

"Thanks to a technical glitch, Donald Trump’s tariffs haven’t even been collected at U.S. ports. “There has been some confusion on what President Trump has said in social media posts on when the tariff starts and what is written in the executive order,” Jarred Varanelli, vice president of U.S. sales at logistics firm Savino Del Bene, told CNBC. “Social media posts are not law on the pause and increase in tariffs. With the constant changes to the regulations, all customs brokers in our industry have a difficult task ahead of them." If there were doubts about the tariffs being a wise policy, those have increased several times over the fact that U.S. authorities can’t even implement them."

Is this really happening!?