Depending on:
i. how the war in Ukraine plays out,
ii. how antagonistic Mr. Trump gets with Europe, and
iii. the outcome of upcoming German elections,
. . . there's a not insignificant chance that certain NATO countries, in particular the ones situated in Southern Europe, and maybe even Germany and France, will be reducing the scope, if not resetting the status of their NATO memberships.
Not sure if a VPN service will suffice, assuming the US government even bothers to null route all of TikTok's IP addresses.
The problem is once TikTok is legally banned for US users, US advertisers won't be able to advertise to US users on TikTok either. US advertisers can try, but no major advertiser will try because they know doing so will earn them the wrath of Congress or even federal prosecutors.
We can't expect TikTok to entertain US based users for free, can we?!