It's not really workable. The real-world impact of a TikTok ban, even if it outright stopped working on every American device overnight is pretty minimal; people stop watching videos, and some influencers lose their jobs.

If my (Canadian) government decides to ban Azure in a year, my critical infrastructure company ignores it for 11 months because they figure it won't actually happen, and then goes to the government to tell them that if the ban actually goes through, our infrastructure stops working because we'd actually need a multi-year timeframe to migrate off of Azure.

Impossible, even in the current crazy atmosphere. An actual ban would mean an all-out commercial war and a very serious dent in globalization.