There are a few things beyond the obvious keeping the Russians sidelined.
If they are now to be considered "Polish" then it is up the PZM to nominate them to contest the GPs -- presumably through next season's GP Challenge system. But obviously, there is a restriction on the nominations from any one governing body. That will mean they take the place of two "real Poles" in the system, which might not go down too well with the Polish public, who don't generally like Russia as a neighbour, and would feel aggrieved if (say) Magic and Dudek were dropped by the PZM to allow Emil and Laguta into the qualifiers......
Another route would be via the European Championship, albeit that only one could win it, and enter the GPs that way.
But again, FIM Europe (a different organisation from the FIM in many ways) will have restrictions of their own.......
In short, I don't see either of the Russians getting back into the GP system in the forseeable future. Unless the war is ended, of course.
Over to you, Mr Putin!