So much for a united front! Gov. Kathy Hochul ripped Mayor Eric Adams’ handling of the Big Apple’s out-of-control migrant crisis, accusing his administration late Tuesday of being slow to act and ignoring repeated offers of state-paid assistance.

The harsh — and previously unseen — public criticism of the city’s migrant response was laid bare in a scathing 12-page letter from Hochul’s lawyer Tuesday night in the wake of the mayor’s persistent cries for extra state and federal help battling the escalating crisis.

“The city has not made timely requests for regulatory changes, has not always promptly shared necessary information with the state, has not implemented programs in a timely manner, and has not consulted the state before taking certain actions,” according to the tersely-worded letter first reported on by the New York Times.

“The city can and should do more to act in a proactive and collaborative manner with the state.”

Despite Adams insisting the city is struggling to find beds for the relentless influx of migrants pouring in, the state said it had offered up a list of potential shelter sites as early as October 2022 — only to be ignored by Big Apple officials.

Hochul’s lawyer went on to break down the $1.5 billion bill the state has already committed to foot amid the escalating crisis — but urged the city to ensure the funds were being “properly managed.”

“The City did not prioritize this critical effort. Had the City done so, it is likely that thousands more migrants would be able to work today.”

The state also accused the Adams administration of dragging its feet, saying the city ignored a suggestion in June last year to set up a “tent city” for adult migrant men to prevent the shelter system from becoming overrun.

“The City took nearly a year to act upon the State’s recommendation,” the letter said.

“The State has identified numerous additional State-owned properties and non-State-owned sites that are viable options for sheltering migrants, but the City has not accepted these offers,” the state’s lawyer, Faith E. Gay, wrote.

“Combined, these sites could provide temporary shelter to more than 3,000 migrants.”

The Big Apple opened its new, state-funded emergency shelter site at the Creedmoor Psychiatric Center in Queens Tuesday, while another “tent city” — also being paid for by the state — is currently under construction at Randall’s Island.

The state said it was still committed to providing the funding even though “substantial questions” had been raised about the conduct of DocGo — the company awarded a hefty $432 million contract by the city to help battle the crisis.

The blunt letter was fired off as Albany’s formal response to a list of demands the city made last week for additional state help as part of ongoing legal proceedings over how to cater to the influx of migrants.

The proceedings center on City Hall’s request to modify the decades-old “right to shelter” mandate requiring the city to provide temporary housing to individuals who ask for it.

The city Law Department submitted a request in May to amend the requirement, pointing to the migrant crisis as a burden that has placed “unprecedented demands” on the city’s resources.

“While we review the state’s letter, we’re encouraged to see our partners in Albany want to deeply engage on this crisis and take a more proactive role in their response,” Fabien Levy, the Deputy Mayor for Communications, said in a statement.

“The city has already spent more than $1.7 billion and expects to spend $5 billion this fiscal year if we do not get the proper support.”