More to the point, as soon as that aircraft lands at an airport outside Russia (or, perhaps, China), a nice young person with a briefcase will be explaining to the FBO that the aircraft is the property of Foobar Leasing, and should not be refueled while the repossession process is under way.
Won’t they get grounded the moment they touch down in controlled airspace? They can probably skirt that for a while but eventually the engines need refurbishment, and that likely requires OEM parts.
And of course any time you have to divert due to a flight emergency you lose that plane.
It looks like a pure retaliation - to make western leasing companies to suffer losses. What to do with the planes I think no-one thinks at this stage. They may use them for scrap metal if will not find a better use.