They also didn't enter Canadian sovereign airspace either, reason being from Feb last year:
"The Government of Canada is prohibiting the operation of Russian-owned, chartered or operated aircraft in Canadian airspace, including in the airspace above Canada’s territorial waters."
That's why rather than simply skirting Greenland and then going pretty much direct to Washington they then had to mess around avoiding Canada by heading very much more southerly than ideal, ducking under all the high level the civilian traffic westbound from Europe and then climb and make the right turn to pretty much head almost due west towards the New York area.
I'd guess at that point the diplomatic agreements mean the US would have to allow overflight and landing.
https://www.canada.ca/en/transport-canada/news/2022/02/government-of-canada-prohibits-russian-aircraft-to-enter-canadian-airspace.html