Here's a Reuters source with a quote from Pompeo.
Asked at a Senate Foreign Relations Committee hearing whether North Korea was still making bomb fuel, Pompeo responded to Democratic Senator Ed Markey by saying: “Yes, that’s correct ... Yes, they continue to produce fissile material.”
Pompeo declined to respond when asked whether North Korea was continuing to pursue submarine-launched ballistic missiles or whether its nuclear program was advancing generally.
He said he would be happy to answer the latter question if necessary in a classified setting, but suggested public statements on the issue would not help “a complex negotiation with a difficult adversary.”
https://www.reuters.com/article/us-northkorea-usa/north-korea-making-bomb-fuel-despite-denuclearization-pledge-pompeo-idUSKBN1KF2QT