No my initial point is, that if you are boarding with how to setup a VPN you are probably not the main user that TikTok is generating money from.
Plus companies will probably not use a platform that is banned in a country to target people in that country.
And plus if you are willing to just Google or look up a single video tutorial about what a VPN is or how to set it up you are probably above of the average Internet user today.
The article (and publisher) is not really specific about what the "technical difficulties" are.
If it's just "we are to lazy to deliver a second build" that should not be a problem. But if they plan to introduce a heavily invasive DRM or Anti-Cheat it may actually become "impossible" to run the game on Linux.