He'll get out - maybe through the embassy. It's not like there would be extradition between Russia and France with the relationship as it is at the moment.
What embassy? He’s a French citizen and a persona non grata in Russia.
He's not persona non grata. He visited Russia last time in October 2021 (see recent reporting by Vaznye Istorii).
(I doubt he'll escape to Russia though).
UAE maybe?
Persona non grata that cabinet ministers are clamoring to be "rescued"?
He likely won't go to Russia since he has fought Russia trying the same thing.