Sorry to say that but that sounds like a "Hitler built the Autobahn" argument for me. Don't be fooled TikTok is highly controlled and influenced by the Chinese government. Yes TikTok is promoting the oppression of the Palestinian people because this topic coincidentally proved to be quite effective in supporting Chinese government agenda and distract from their own problems. The voices of other oppressed people are still silenced on that very same platform, see almost every inner chines dispute.
And it's not that TikTok would be the only platform that Palestinian voices could be and are actually heard. You can speak about this on almost every other platform. Plus: if all this people would just leave TikTok and use the Fidivers instead this would be a double win for everyone including the other oppressed voices on TikTok.
Just because it's much more common in those countries compared to USA or Europe to use a VPN it doesn't mean the average user there is actually using them. If there are even regions where it's forbidden to use a VPN (than that's highly concerning more than a TikTok ban or anything else!) it's even more unlikely the average user will have VPN access.
And again all of my other points I think are much more important in that thought process.