Googling it returns this HN comment, so probably not. They are correct though when saying that the block has been in place for at least a few months now: https://x.com/Forceultraomega/status/1795189735297605635

Screenshot of the source code: https://x.com/StopAntisemites/status/1848445010708205758

Hardcoded; only Palestine and Israel.

We'll know for sure the next time twitch's source code leaks