One of the key things blocking extradition from the UK to the US is that UK law doesn't let them extradite if the person will be tortured, executed, or won't receive a fair trial in the destination country. This isn't something that politicians can bypass, except by changing the law; judges are not political appointees in the UK.

This means the extradition process from the UK to the US relies on the UK receiving assurances, and the courts accepting them, because the US has always followed its agreements in the past. To me it seems unlikely the US would want to jeopardise this.

And what would the benefit be? They've already shown they have the power to ruin people's lives at will, effectively imprisoning them in an embassy for a decade. That seems like a deterrent that will scare off most journalists.

So MAGA would probably take up his cause, but with the Biden admin freeing him (fingers crossed), that's one less thing they can use against Biden in the elections.