“Were” is technically not wrong because it’s a past subjunctive. But neither is “was” wrong. Since Griner actually is in jail and it’s not entirely hypothetical, my statement was more indicative, making “was” the right word because “child” is singular.
Correct. Griner is currently in a Russian jail, which makes your statement a real conditional.
Subjunctive or unreal conditional:
If my child were in a Russian prison...
Real conditional:
If my child was in a Russian prison like Griner...
I think some are splitting hairs on this, but if they do then they needs 😅 to put your thoughts in complete context.