Russia is not very safe. Russia is a shithole full of shitheads.
He could flee to Finland, that is a nice country and where both puberty blockers and “gender affirming” therapy are banned.
From which he will get extradited when a marxist DA in NY or DC decides to make a political example of him.
Here's a list of countries the US doesn't have extradition treaties with: (from Leftopedia) ". . . China, Indonesia, Iran, Mongolia, Qatar, Saudi Arabia, Taiwan, Ukraine, Vietnam, most African nations and most former Soviet states, among others."
If it was my son, I'd do anything to keep the leftist demons from destroying his body, mind and soul. That includes splitting with him to even a corrupt craphole country like Russia, or any other non-extradition place, which disallows this gender madness. Indeed, my only concern would be keeping my kid safe and away from these monsters and thereby saving his life.