I'm not sure how closing their domestic office while not banning or ordering significant changes accomplishes anything.
It really just hurts Canadian tech workers who will take contractor roles with the TikTok US office. I've met a few TikTok employees and they're actually very high caliber workers, so it would be a shame to lose them (though I disagree with the ownership of TikTok and refuse to use it).
If anything we should take a page out of China's book and require an office where we hold the leadership directly accountable for those security concerns, which frankly 99% of people don't understand or care about.