No, it doesn't say why. And it also doesn't actually say Biden spent that money. It says Congress "allocated" $7.5 billion. There are plenty of processes between allocation and actual expenditure that could be holding this up.

It prob takes at least 6 months for the money to be available, a bunch of time to figure out land permissions and contracts, time to negotiate with suppliers. 2 years means first stations prob starting to roll out about now.