The US is not, in fact, collecting money for disposal, and has not been for years.

The US is, instead, handing back all the money that was collected to the remaining nuke operators.

Not, notably, to the ratepayers it was collected from.

This is fallout from a court case where nuke operators argued that disposal was flimflam, so the money was collected fraudulently. The court agreed, and ordered the money returned. Not to those it came from, but just to whoever was still operating.